Merge pull request 'Ящики из веб-почты: создать, новый пароль, выключить (для администратора)' (#16) from feat/admin-mailboxes into master

Reviewed-on: #16

README.md

@@ -67,6 +67,7 @@ API: `GET /api/config` (без входа), `/api/me`, `/api/me/password`, `/api
 | `MAIL_DOMAINS` | наши домены, через запятую | `localhost` |
 | `MAIL_HOSTNAME` | имя сервера в SMTP | `localhost` |
 | `MAIL_ADMIN_EMAIL`, `MAIL_ADMIN_PASSWORD` | первый ящик на пустой базе; без пароля — случайный (в `MAIL_PASSWORDS_FILE` или один раз в логе) | `admin@<первый домен>` |
+| `MAIL_ADMINS` | кто управляет ящиками (Настройки → Mailboxes: создать, новый пароль, выключить), через запятую | первый ящик (`MAIL_ADMIN_EMAIL` или `admin@<первый домен>`) |
 | `MAIL_PASSWORDS_FILE` | файл (права 600), куда дописываются случайные пароли созданных ящиков: первого и ловушки | — (в образе `/app/data/initial-passwords.txt`) |
 | `MAIL_REGISTRATION` | открыть регистрацию | `false` |
 | `MAIL_CATCH_ALL` | ящик-ловушка: письма на адреса без своего ящика здесь (и на чужие домены) — сюда, наружу ничего; ящик создаётся при старте | — |

backend/src/main/java/com/mailserver/config/MailAdmins.java

@@ -0,0 +1,36 @@
+package com.mailserver.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Who manages mailboxes (Settings → Mailboxes): {@code mailserver.admins} (comma separated), by default the first
+ * mailbox — {@code mailserver.admin.email}, or admin@<first domain>. No role in the database: the list lives in
+ * the configuration, so a stolen mailbox can not make itself an administrator.
+ */
+@Component
+public class MailAdmins {
+
+    private final Set<String> admins;
+
+    public MailAdmins(@Value("${mailserver.admins:}") String admins,
+                      @Value("${mailserver.admin.email:}") String firstMailbox,
+                      MailDomains domains) {
+        String list = !admins.isBlank() ? admins
+                : !firstMailbox.isBlank() ? firstMailbox
+                : "admin@" + domains.domains().iterator().next();
+        this.admins = Arrays.stream(list.split(","))
+                .map(a -> a.trim().toLowerCase(Locale.ROOT))
+                .filter(a -> !a.isEmpty())
+                .collect(Collectors.toUnmodifiableSet());
+    }
+
+    public boolean isAdmin(String email) {
+        return email != null && admins.contains(email.toLowerCase(Locale.ROOT));
+    }
+}

backend/src/main/java/com/mailserver/controller/AuthenticationController.java

@@ -1,5 +1,6 @@
 package com.mailserver.controller;
 
+import com.mailserver.config.MailAdmins;
 import com.mailserver.config.MailDomains;
 import com.mailserver.domain.User;
 import com.mailserver.dto.LoginRequest;
@@ -55,11 +56,13 @@ public class AuthenticationController {
     private final MailDomains domains;
     private final boolean registrationEnabled;
     private final LoginGuard guard;
+    private final MailAdmins admins;
 
     public AuthenticationController(UserService userService, MailService mailService, JwtUtils jwtUtils, MailDomains domains,
                                     @Value("${mailserver.registration.enabled:false}") boolean registrationEnabled,
-                                    LoginGuard guard) {
+                                    LoginGuard guard, MailAdmins admins) {
         this.guard = guard;
+        this.admins = admins;
         this.userService = userService;
         this.mailService = mailService;
         this.jwtUtils = jwtUtils;
@@ -179,7 +182,8 @@ public class AuthenticationController {
     private Mono<ProfileResponse> profile(User user) {
         return mailService.usedBytes(user.getId())
                 .map(used -> new ProfileResponse(user.getEmail(), user.getDisplayName(), used,
-                        user.getQuotaBytes() == null ? 0 : user.getQuotaBytes(), user.getCreatedAt()));
+                        user.getQuotaBytes() == null ? 0 : user.getQuotaBytes(), user.getCreatedAt(),
+                        admins.isAdmin(user.getEmail())));
     }
 
     private Mono<User> user(Mono<Authentication> auth) {

backend/src/main/java/com/mailserver/controller/MailboxAdminController.java

@@ -0,0 +1,165 @@
+package com.mailserver.controller;
+
+import com.mailserver.config.MailAdmins;
+import com.mailserver.config.MailDomains;
+import com.mailserver.domain.User;
+import com.mailserver.service.MailService;
+import com.mailserver.service.UserService;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ResponseStatusException;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.security.SecureRandom;
+import java.time.Instant;
+import java.util.Base64;
+import java.util.Comparator;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+/**
+ * Mailboxes of this server for its administrators ({@link MailAdmins}): list, create (no-reply@, monitor@,
+ * support@ — registration stays closed), new password, switch off. A generated password is returned once, in the
+ * answer — it is not logged.
+ */
+@RestController
+@RequestMapping("/api/admin/mailboxes")
+public class MailboxAdminController {
+
+    private static final Logger log = LoggerFactory.getLogger(MailboxAdminController.class);
+    private static final Pattern LOCAL_PART = Pattern.compile("[a-z0-9](?:[a-z0-9._+-]{0,62}[a-z0-9])?");
+    private static final int MIN_PASSWORD = 10;
+
+    public record MailboxView(Long id, String email, String displayName, boolean active, boolean admin,
+                              long usedBytes, long quotaBytes, Instant createdAt) {
+    }
+
+    /** @param password empty — the server generates one and returns it once */
+    public record CreateRequest(@NotBlank @Size(max = 254) String email, @Size(max = 100) String displayName,
+                                @Size(max = 200) String password) {
+    }
+
+    public record PasswordRequest(@Size(max = 200) String password) {
+    }
+
+    public record ActiveRequest(boolean active) {
+    }
+
+    /** @param password the generated password, or null when the administrator chose it */
+    public record Created(MailboxView mailbox, String password) {
+    }
+
+    private final UserService users;
+    private final MailService mail;
+    private final MailDomains domains;
+    private final MailAdmins admins;
+
+    public MailboxAdminController(UserService users, MailService mail, MailDomains domains, MailAdmins admins) {
+        this.users = users;
+        this.mail = mail;
+        this.domains = domains;
+        this.admins = admins;
+    }
+
+    @GetMapping
+    public Flux<MailboxView> list(Mono<Authentication> auth) {
+        return admin(auth).thenMany(users.all())
+                .concatMap(this::view)
+                .sort(Comparator.comparing(MailboxView::email));
+    }
+
+    @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
+    public Mono<Created> create(Mono<Authentication> auth, @RequestBody Mono<CreateRequest> body) {
+        return admin(auth).then(body).flatMap(request -> {
+            String email = request.email() == null ? "" : request.email().trim().toLowerCase(Locale.ROOT);
+            int at = email.lastIndexOf('@');
+            if (at <= 0 || !LOCAL_PART.matcher(email.substring(0, at)).matches()) {
+                return Mono.error(bad("Not a mailbox address: " + email));
+            }
+            if (!domains.isLocal(email)) {
+                return Mono.error(bad("Mailboxes can be created only in " + String.join(", ", domains.domains().stream().sorted().toList())));
+            }
+            String chosen = request.password() == null ? "" : request.password();
+            if (!chosen.isEmpty() && chosen.length() < MIN_PASSWORD) {
+                return Mono.error(bad("Password: at least " + MIN_PASSWORD + " characters, or leave it empty to generate one"));
+            }
+            String password = chosen.isEmpty() ? randomPassword() : chosen;
+            return users.register(email, password, request.displayName())
+                    .onErrorMap(IllegalArgumentException.class, e -> new ResponseStatusException(HttpStatus.CONFLICT, "This mailbox already exists"))
+                    .doOnNext(user -> log.info("Mailbox created by administrator: {}", email))
+                    .flatMap(this::view)
+                    .map(view -> new Created(view, chosen.isEmpty() ? password : null));
+        });
+    }
+
+    /** New password: the given one, or a generated one returned once. */
+    @PostMapping("/{id}/password")
+    public Mono<Created> password(Mono<Authentication> auth, @PathVariable Long id, @RequestBody Mono<PasswordRequest> body) {
+        return admin(auth).then(body.defaultIfEmpty(new PasswordRequest(null))).flatMap(request -> {
+            String chosen = request.password() == null ? "" : request.password();
+            if (!chosen.isEmpty() && chosen.length() < MIN_PASSWORD) {
+                return Mono.error(bad("Password: at least " + MIN_PASSWORD + " characters, or leave it empty to generate one"));
+            }
+            String password = chosen.isEmpty() ? randomPassword() : chosen;
+            return mailbox(id)
+                    .flatMap(user -> users.setPassword(user, password))
+                    .doOnNext(user -> log.info("Password of {} set by administrator", user.getEmail()))
+                    .flatMap(this::view)
+                    .map(view -> new Created(view, chosen.isEmpty() ? password : null));
+        });
+    }
+
+    /** Switched off: no login (web, SMTP, IMAP); mail to it is still received. */
+    @PutMapping("/{id}/active")
+    public Mono<MailboxView> active(Mono<Authentication> auth, @PathVariable Long id, @RequestBody Mono<ActiveRequest> body) {
+        return admin(auth).flatMap(me -> body.flatMap(request -> mailbox(id).flatMap(user -> {
+            if (!request.active() && user.getEmail().equalsIgnoreCase(me)) {
+                return Mono.error(bad("You can not switch off your own mailbox"));
+            }
+            log.info("Mailbox {} {} by administrator", user.getEmail(), request.active() ? "switched on" : "switched off");
+            return users.setActive(user, request.active());
+        }))).flatMap(this::view);
+    }
+
+    private Mono<String> admin(Mono<Authentication> auth) {
+        return auth.switchIfEmpty(Mono.error(new ResponseStatusException(HttpStatus.UNAUTHORIZED)))
+                .map(Authentication::getName)
+                .filter(admins::isAdmin)
+                .switchIfEmpty(Mono.error(new ResponseStatusException(HttpStatus.FORBIDDEN, "Only for mail administrators")));
+    }
+
+    private Mono<User> mailbox(Long id) {
+        return users.byId(id).switchIfEmpty(Mono.error(new ResponseStatusException(HttpStatus.NOT_FOUND, "Mailbox not found")));
+    }
+
+    private Mono<MailboxView> view(User user) {
+        return mail.usedBytes(user.getId()).defaultIfEmpty(0L)
+                .map(used -> new MailboxView(user.getId(), user.getEmail(), user.getDisplayName(), user.isActive(),
+                        admins.isAdmin(user.getEmail()), used, user.getQuotaBytes() == null ? 0 : user.getQuotaBytes(),
+                        user.getCreatedAt()));
+    }
+
+    private static ResponseStatusException bad(String message) {
+        return new ResponseStatusException(HttpStatus.BAD_REQUEST, message);
+    }
+
+    static String randomPassword() {
+        byte[] bytes = new byte[18];
+        new SecureRandom().nextBytes(bytes);
+        return Base64.getUrlEncoder().withoutPadding().encodeToString(bytes);
+    }
+}

backend/src/main/java/com/mailserver/dto/ProfileResponse.java

@@ -2,5 +2,7 @@ package com.mailserver.dto;
 
 import java.time.Instant;
 
-public record ProfileResponse(String email, String displayName, long usedBytes, long quotaBytes, Instant createdAt) {
+/** @param admin may manage mailboxes ({@link com.mailserver.config.MailAdmins}) */
+public record ProfileResponse(String email, String displayName, long usedBytes, long quotaBytes, Instant createdAt,
+                              boolean admin) {
 }

backend/src/main/java/com/mailserver/service/UserService.java

@@ -74,6 +74,25 @@ public class UserService {
         return userRepository.save(user).then();
     }
 
+    public Flux<User> all() {
+        return userRepository.findAll();
+    }
+
+    public Mono<User> byId(Long id) {
+        return userRepository.findById(id);
+    }
+
+    /** Administrator sets a new password (Settings → Mailboxes): no current password needed. */
+    public Mono<User> setPassword(User user, String newPassword) {
+        user.setPassword(passwordEncoder.encode(newPassword));
+        return userRepository.save(user);
+    }
+
+    public Mono<User> setActive(User user, boolean active) {
+        user.setActive(active);
+        return userRepository.save(user);
+    }
+
     public Mono<User> updateDisplayName(User user, String displayName) {
         user.setDisplayName(displayName.trim());
         return userRepository.save(user);

backend/src/main/resources/application.properties

@@ -27,6 +27,8 @@ mailserver.catch-all=${MAIL_CATCH_ALL:}
 mailserver.registration.enabled=${MAIL_REGISTRATION:false}
 mailserver.admin.email=${MAIL_ADMIN_EMAIL:}
 mailserver.admin.password=${MAIL_ADMIN_PASSWORD:}
+# Who manages mailboxes (Settings → Mailboxes), comma separated; empty — the first mailbox (admin.email or admin@<first domain>)
+mailserver.admins=${MAIL_ADMINS:}
 # Generated passwords of created mailboxes (first admin, catch-all) are appended here (mode 600); empty — printed to the log once
 mailserver.passwords-file=${MAIL_PASSWORDS_FILE:}
 mailserver.cors.origins=${MAIL_CORS_ORIGINS:}

backend/src/test/java/com/mailserver/controller/AuthenticationControllerTest.java

@@ -34,7 +34,7 @@ class AuthenticationControllerTest {
     private final LoginGuard guard = new LoginGuard(new LoginGuard.Settings(true, 3, 100, Duration.ofMinutes(15),
             Duration.ofMinutes(15), Duration.ofHours(24), Duration.ofDays(30), Set.of(), Duration.ZERO));
     private final AuthenticationController controller = new AuthenticationController(users, mock(MailService.class), jwt,
-            mock(MailDomains.class), false, guard);
+            mock(MailDomains.class), false, guard, mock(com.mailserver.config.MailAdmins.class));
 
     private final User alice = new User();
 

backend/src/test/java/com/mailserver/controller/MailboxAdminControllerTest.java

@@ -0,0 +1,129 @@
+package com.mailserver.controller;
+
+import com.mailserver.config.MailAdmins;
+import com.mailserver.config.MailDomains;
+import com.mailserver.domain.User;
+import com.mailserver.service.MailService;
+import com.mailserver.service.UserService;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.server.ResponseStatusException;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/** Settings → Mailboxes: only administrators; mailboxes only in our domains; a generated password comes back once. */
+class MailboxAdminControllerTest {
+
+    private final UserService users = mock(UserService.class);
+    private final MailService mail = mock(MailService.class);
+    private final MailDomains domains = new MailDomains("jambocheck.com", "");
+    private final MailAdmins admins = new MailAdmins("", "", domains);
+    private final MailboxAdminController controller = new MailboxAdminController(users, mail, domains, admins);
+
+    private final User admin = user(1L, "admin@jambocheck.com");
+    private final User alice = user(2L, "alice@jambocheck.com");
+
+    MailboxAdminControllerTest() {
+        when(mail.usedBytes(anyLong())).thenReturn(Mono.just(0L));
+        when(users.all()).thenReturn(Flux.just(alice, admin));
+        when(users.byId(1L)).thenReturn(Mono.just(admin));
+        when(users.byId(2L)).thenReturn(Mono.just(alice));
+        when(users.register(anyString(), anyString(), any())).thenAnswer(i -> Mono.just(user(3L, i.getArgument(0))));
+        when(users.setPassword(any(), anyString())).thenAnswer(i -> Mono.just((User) i.getArgument(0)));
+        when(users.setActive(any(), any(Boolean.class))).thenAnswer(i -> {
+            User u = i.getArgument(0);
+            u.setActive(i.getArgument(1));
+            return Mono.just(u);
+        });
+    }
+
+    @Test
+    void administratorIsTheFirstMailboxByDefault() {
+        assertThat(admins.isAdmin("ADMIN@jambocheck.com")).isTrue();
+        assertThat(admins.isAdmin("alice@jambocheck.com")).isFalse();
+        assertThat(new MailAdmins("ops@jambocheck.com, root@jambocheck.com", "admin@jambocheck.com", domains).isAdmin("admin@jambocheck.com")).isFalse();
+    }
+
+    @Test
+    void listsMailboxesSortedForAnAdministratorOnly() {
+        List<MailboxAdminController.MailboxView> list = controller.list(as("admin@jambocheck.com")).collectList().block();
+        assertThat(list).extracting(MailboxAdminController.MailboxView::email).containsExactly("admin@jambocheck.com", "alice@jambocheck.com");
+        assertThat(list.get(0).admin()).isTrue();
+
+        assertThat(status(() -> controller.list(as("alice@jambocheck.com")).collectList().block())).isEqualTo(HttpStatus.FORBIDDEN);
+    }
+
+    @Test
+    void createsReservedNamesWithAGeneratedPasswordShownOnce() {
+        var created = controller.create(as("admin@jambocheck.com"),
+                Mono.just(new MailboxAdminController.CreateRequest(" No-Reply@JamboCheck.com ", "Jambotron", ""))).block();
+
+        assertThat(created.mailbox().email()).isEqualTo("no-reply@jambocheck.com");
+        assertThat(created.password()).hasSizeGreaterThanOrEqualTo(20);
+        verify(users).register(eq("no-reply@jambocheck.com"), eq(created.password()), eq("Jambotron"));
+
+        var chosen = controller.create(as("admin@jambocheck.com"),
+                Mono.just(new MailboxAdminController.CreateRequest("monitor@jambocheck.com", null, "long-enough-1"))).block();
+        assertThat(chosen.password()).isNull();
+    }
+
+    @Test
+    void refusesOtherDomainsBadAddressesShortPasswordsAndNonAdmins() {
+        assertThat(status(() -> create("admin@jambocheck.com", "x@gmail.com", ""))).isEqualTo(HttpStatus.BAD_REQUEST);
+        assertThat(status(() -> create("admin@jambocheck.com", "bad address@jambocheck.com", ""))).isEqualTo(HttpStatus.BAD_REQUEST);
+        assertThat(status(() -> create("admin@jambocheck.com", "x@jambocheck.com", "short"))).isEqualTo(HttpStatus.BAD_REQUEST);
+        assertThat(status(() -> create("alice@jambocheck.com", "x@jambocheck.com", ""))).isEqualTo(HttpStatus.FORBIDDEN);
+        verify(users, never()).register(anyString(), anyString(), any());
+
+        when(users.register(eq("alice@jambocheck.com"), anyString(), any())).thenReturn(Mono.error(new IllegalArgumentException("exists")));
+        assertThat(status(() -> create("admin@jambocheck.com", "alice@jambocheck.com", ""))).isEqualTo(HttpStatus.CONFLICT);
+    }
+
+    @Test
+    void newPasswordAndSwitchOffButNotYourself() {
+        var reset = controller.password(as("admin@jambocheck.com"), 2L, Mono.just(new MailboxAdminController.PasswordRequest(null))).block();
+        assertThat(reset.password()).isNotBlank();
+        verify(users).setPassword(alice, reset.password());
+
+        assertThat(controller.active(as("admin@jambocheck.com"), 2L, Mono.just(new MailboxAdminController.ActiveRequest(false))).block().active()).isFalse();
+        assertThat(status(() -> controller.active(as("admin@jambocheck.com"), 1L, Mono.just(new MailboxAdminController.ActiveRequest(false))).block()))
+                .isEqualTo(HttpStatus.BAD_REQUEST);
+    }
+
+    private MailboxAdminController.Created create(String me, String email, String password) {
+        return controller.create(as(me), Mono.just(new MailboxAdminController.CreateRequest(email, null, password))).block();
+    }
+
+    private static Mono<Authentication> as(String email) {
+        return Mono.just(new UsernamePasswordAuthenticationToken(email, null, List.of()));
+    }
+
+    private static HttpStatus status(Runnable call) {
+        Throwable error = org.assertj.core.api.Assertions.catchThrowable(call::run);
+        assertThat(error).isInstanceOf(ResponseStatusException.class);
+        return HttpStatus.valueOf(((ResponseStatusException) error).getStatusCode().value());
+    }
+
+    private static User user(Long id, String email) {
+        User user = new User();
+        user.setId(id);
+        user.setEmail(email);
+        user.setPassword("hash");
+        return user;
+    }
+}

frontend/src/app/core/api.service.ts

@@ -1,7 +1,7 @@
 import { Injectable, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
-import { Attachment, BlacklistEntry, Contact, Draft, Folder, Message, Profile, ServerConfig } from './models';
+import { Attachment, BlacklistEntry, Contact, Draft, Folder, Mailbox, MailboxCreated, Message, Profile, ServerConfig } from './models';
 
 /** The mail server REST API (same origin, /api). */
 @Injectable({ providedIn: 'root' })
@@ -17,6 +17,18 @@ export class ApiService {
     return this.http.put('/api/me/password', { currentPassword, newPassword });
   }
 
+  // mailboxes — administrators only
+  mailboxes(): Observable<Mailbox[]> { return this.http.get<Mailbox[]>('/api/admin/mailboxes'); }
+  createMailbox(email: string, displayName: string, password: string): Observable<MailboxCreated> {
+    return this.http.post<MailboxCreated>('/api/admin/mailboxes', { email, displayName, password });
+  }
+  newMailboxPassword(id: number): Observable<MailboxCreated> {
+    return this.http.post<MailboxCreated>(`/api/admin/mailboxes/${id}/password`, {});
+  }
+  setMailboxActive(id: number, active: boolean): Observable<Mailbox> {
+    return this.http.put<Mailbox>(`/api/admin/mailboxes/${id}/active`, { active });
+  }
+
   // folders
   folders(): Observable<Folder[]> { return this.http.get<Folder[]>('/api/folders'); }
   createFolder(name: string): Observable<Folder> { return this.http.post<Folder>('/api/folders', { name }); }

frontend/src/app/core/models.ts

@@ -53,6 +53,25 @@ export interface Profile {
   usedBytes: number;
   quotaBytes: number;
   createdAt: string;
+  admin?: boolean;        // may manage mailboxes (Settings → Mailboxes)
+}
+
+/** MailboxAdminController.MailboxView */
+export interface Mailbox {
+  id: number;
+  email: string;
+  displayName: string;
+  active: boolean;
+  admin: boolean;
+  usedBytes: number;
+  quotaBytes: number;
+  createdAt: string;
+}
+
+/** password — generated by the server, shown once; null when the administrator chose it */
+export interface MailboxCreated {
+  mailbox: Mailbox;
+  password: string | null;
 }
 
 export interface ServerConfig {

frontend/src/app/pages/settings/mailboxes.section.ts

@@ -0,0 +1,124 @@
+import { ChangeDetectionStrategy, Component, computed, inject, signal } from '@angular/core';
+import { FormsModule } from '@angular/forms';
+import { MatIconModule } from '@angular/material/icon';
+import { ApiService } from '../../core/api.service';
+import { MailStateService } from '../../core/mail-state.service';
+import { Mailbox, errorText, formatBytes } from '../../core/models';
+import { ToastService } from '../../ui/toast.service';
+
+/** Settings → Mailboxes (administrators): create no-reply@, monitor@, support@ …, new password, switch off. */
+@Component({
+  selector: 'app-mailboxes-section',
+  imports: [FormsModule, MatIconModule],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  template: `
+    <section class="glass-panel static p-5 md:p-6 xl:col-span-2" aria-labelledby="mailboxes-title">
+      <h2 id="mailboxes-title" class="text-lg font-orbitron font-bold text-cyan-300 flex items-center gap-2 mb-4 border-b border-cyan-500/20 pb-2">
+        <mat-icon class="text-pink-500">group</mat-icon> MAILBOXES
+      </h2>
+
+      <form (ngSubmit)="create()" class="grid grid-cols-1 md:grid-cols-[1fr_1fr_1fr_auto] gap-3 items-end mb-4">
+        <div><label class="synth-label" for="mb-email">Address</label>
+          <input id="mb-email" name="email" class="synth-input" [(ngModel)]="email" [placeholder]="'no-reply@' + domain()" autocomplete="off" required></div>
+        <div><label class="synth-label" for="mb-name">Name</label>
+          <input id="mb-name" name="name" class="synth-input" [(ngModel)]="name" maxlength="100" autocomplete="off"></div>
+        <div><label class="synth-label" for="mb-password">Password (empty — generate)</label>
+          <input id="mb-password" name="password" type="password" class="synth-input" [(ngModel)]="password" autocomplete="new-password"></div>
+        <button type="submit" class="cyber-btn px-4 py-2 rounded-lg text-xs font-bold" [disabled]="busy()"><mat-icon>add</mat-icon> CREATE</button>
+      </form>
+      @if (error()) { <p class="text-sm text-pink-400 mb-3" role="alert">{{ error() }}</p> }
+
+      @if (secret(); as s) {
+        <div class="p-3 mb-4 rounded-lg border border-pink-500/40 bg-slate-900/60" role="status">
+          <div class="text-xs text-slate-400 mb-1">Password of <span class="font-mono text-cyan-300">{{ s.email }}</span> — shown once, copy it now</div>
+          <div class="flex items-center gap-2">
+            <code class="font-mono text-pink-300 break-all select-all">{{ s.password }}</code>
+            <button type="button" class="ghost-btn !py-1" (click)="copy(s.password)" aria-label="Copy password"><mat-icon>content_copy</mat-icon></button>
+            <button type="button" class="ghost-btn !py-1" (click)="secret.set(null)" aria-label="Hide password"><mat-icon>close</mat-icon></button>
+          </div>
+        </div>
+      }
+
+      <ul class="divide-y divide-cyan-500/10">
+        @for (m of mailboxes(); track m.id) {
+          <li class="flex flex-wrap items-center gap-x-4 gap-y-1 py-2">
+            <span class="font-mono text-sm" [class.text-cyan-300]="m.active" [class.text-slate-500]="!m.active" [class.line-through]="!m.active">{{ m.email }}</span>
+            <span class="text-sm text-slate-400">{{ m.displayName }}</span>
+            @if (m.admin) { <span class="text-[10px] font-mono px-1.5 rounded border border-pink-500/40 text-pink-300">ADMIN</span> }
+            <span class="text-xs font-mono text-slate-500 ml-auto">{{ size(m.usedBytes) }}</span>
+            <button type="button" class="ghost-btn !py-1" (click)="newPassword(m)" [attr.aria-label]="'New password for ' + m.email"><mat-icon>key</mat-icon></button>
+            @if (m.email !== me()) {
+              <button type="button" class="ghost-btn !py-1" (click)="toggle(m)"
+                      [attr.aria-label]="(m.active ? 'Switch off ' : 'Switch on ') + m.email">
+                <mat-icon>{{ m.active ? 'toggle_on' : 'toggle_off' }}</mat-icon></button>
+            }
+          </li>
+        }
+      </ul>
+    </section>
+  `
+})
+export class MailboxesSection {
+  private api = inject(ApiService);
+  private state = inject(MailStateService);
+  private toasts = inject(ToastService);
+
+  readonly mailboxes = signal<Mailbox[]>([]);
+  readonly secret = signal<{ email: string; password: string } | null>(null);
+  readonly error = signal('');
+  readonly busy = signal(false);
+  readonly me = computed(() => this.state.profile()?.email ?? '');
+  readonly domain = computed(() => this.me().split('@')[1] ?? 'example.com');
+
+  email = '';
+  name = '';
+  password = '';
+
+  constructor() {
+    this.load();
+  }
+
+  size(bytes: number): string {
+    return formatBytes(bytes);
+  }
+
+  load(): void {
+    this.api.mailboxes().subscribe({ next: list => this.mailboxes.set(list), error: e => this.error.set(errorText(e)) });
+  }
+
+  create(): void {
+    const email = this.email.trim();
+    if (!email) { this.error.set('Enter an address'); return; }
+    this.error.set('');
+    this.busy.set(true);
+    this.api.createMailbox(email, this.name.trim(), this.password).subscribe({
+      next: created => {
+        this.busy.set(false);
+        this.email = this.name = this.password = '';
+        if (created.password) { this.secret.set({ email: created.mailbox.email, password: created.password }); }
+        this.toasts.ok('Mailbox ' + created.mailbox.email + ' created');
+        this.load();
+      },
+      error: e => { this.busy.set(false); this.error.set(errorText(e)); }
+    });
+  }
+
+  newPassword(m: Mailbox): void {
+    if (!confirm('New password for ' + m.email + '? The old one stops working at once.')) return;
+    this.api.newMailboxPassword(m.id).subscribe({
+      next: created => created.password && this.secret.set({ email: m.email, password: created.password }),
+      error: e => this.toasts.error(errorText(e))
+    });
+  }
+
+  toggle(m: Mailbox): void {
+    this.api.setMailboxActive(m.id, !m.active).subscribe({
+      next: () => this.load(),
+      error: e => this.toasts.error(errorText(e))
+    });
+  }
+
+  copy(text: string): void {
+    navigator.clipboard?.writeText(text).then(() => this.toasts.ok('Copied'), () => this.toasts.error('Copy it by hand'));
+  }
+}

frontend/src/app/pages/settings/settings.page.ts

@@ -7,11 +7,12 @@ import { MailStateService } from '../../core/mail-state.service';
 import { errorText, formatBytes } from '../../core/models';
 import { THEMES, ThemeService } from '../../ui/theme.service';
 import { ToastService } from '../../ui/toast.service';
+import { MailboxesSection } from './mailboxes.section';
 
 /** Profile name, password, storage, look. */
 @Component({
   selector: 'app-settings',
-  imports: [DatePipe, FormsModule, MatIconModule],
+  imports: [DatePipe, FormsModule, MatIconModule, MailboxesSection],
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: `
     <div class="grid grid-cols-1 xl:grid-cols-2 gap-5">
@@ -97,6 +98,10 @@ import { ToastService } from '../../ui/toast.service';
           </div>
         </div>
       </section>
+
+      @if (state.profile()?.admin) {
+        <app-mailboxes-section />
+      }
     </div>
   `
 })