diff --git a/src/app.module.spec.ts b/src/app.module.spec.ts
deleted file mode 100644
index 2cc290a..0000000
--- a/src/app.module.spec.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { Test } from '@nestjs/testing';
-import { describe, it, expect } from 'vitest';
-import { AppModule } from './app.module';
-
-describe('AppModule', () => {
-  it('should compile the module', async () => {
-    const module = await Test.createTestingModule({
-      imports: [AppModule],
-    }).compile();
-
-    expect(module).toBeDefined();
-  });
-});
diff --git a/src/app.module.ts b/src/app.module.ts
index 2e8c781..890ddeb 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
-import { ConfigModule } from '@nestjs/config';
+import { ConfigModule, ConfigService } from '@nestjs/config';
 import { EventEmitterModule } from '@nestjs/event-emitter';
+import { SequelizeModule } from '@nestjs/sequelize';
 import { LoggerModule } from 'nestjs-pino';
 import { nanoid } from 'nanoid';
 import configuration from './config/configuration';
@@ -8,6 +9,7 @@ import { HealthModule } from './modules/health/health.module';
 import { JmapModule } from './modules/infrastructure/jmap/jmap.module';
 import { EmailModule } from './modules/email/email.module';
 import { AuthModule } from './modules/auth/auth.module';
+import { AccountModule } from './modules/account/account.module';
 
 @Module({
   imports: [
@@ -43,11 +45,42 @@ import { AuthModule } from './modules/auth/auth.module';
       load: [configuration],
       isGlobal: true,
     }),
+    SequelizeModule.forRootAsync({
+      imports: [ConfigModule],
+      inject: [ConfigService],
+      useFactory: (configService: ConfigService) => ({
+        dialect: 'postgres',
+        autoLoadModels: true,
+        synchronize: false,
+        host: configService.get('database.host'),
+        port: configService.get('database.port'),
+        username: configService.get('database.username'),
+        password: configService.get('database.password'),
+        database: configService.get('database.name'),
+        pool: {
+          max: 20,
+          min: 0,
+          idle: 20000,
+          acquire: 20000,
+        },
+        dialectOptions: configService.get('isProduction')
+          ? {
+              ssl: {
+                require: true,
+                rejectUnauthorized: false,
+              },
+              application_name: 'mail-server',
+            }
+          : {},
+        logging: configService.get('isDevelopment') ? console.log : false,
+      }),
+    }),
     EventEmitterModule.forRoot({ wildcard: true, delimiter: '.' }),
     HealthModule,
     JmapModule,
     EmailModule,
     AuthModule,
+    AccountModule,
   ],
   controllers: [],
   providers: [],
diff --git a/src/modules/account/account.module.ts b/src/modules/account/account.module.ts
new file mode 100644
index 0000000..ddbe841
--- /dev/null
+++ b/src/modules/account/account.module.ts
@@ -0,0 +1,21 @@
+import { Module } from '@nestjs/common';
+import { SequelizeModule } from '@nestjs/sequelize';
+import {
+  MailAccountModel,
+  MailAddressModel,
+  MailDomainModel,
+  MailProviderAccountModel,
+} from './models/index.js';
+
+@Module({
+  imports: [
+    SequelizeModule.forFeature([
+      MailAccountModel,
+      MailAddressModel,
+      MailDomainModel,
+      MailProviderAccountModel,
+    ]),
+  ],
+  exports: [SequelizeModule],
+})
+export class AccountModule {}
diff --git a/src/modules/account/models/index.ts b/src/modules/account/models/index.ts
new file mode 100644
index 0000000..5e95fd7
--- /dev/null
+++ b/src/modules/account/models/index.ts
@@ -0,0 +1,4 @@
+export { MailAccountModel } from './mail-account.model.js';
+export { MailAddressModel } from './mail-address.model.js';
+export { MailDomainModel } from './mail-domain.model.js';
+export { MailProviderAccountModel } from './mail-provider-account.model.js';
diff --git a/src/modules/account/models/mail-account.model.ts b/src/modules/account/models/mail-account.model.ts
new file mode 100644
index 0000000..f97e870
--- /dev/null
+++ b/src/modules/account/models/mail-account.model.ts
@@ -0,0 +1,32 @@
+import {
+  AllowNull,
+  Column,
+  DataType,
+  Default,
+  HasMany,
+  Model,
+  PrimaryKey,
+  Table,
+  Unique,
+} from 'sequelize-typescript';
+import { MailAddressModel } from './mail-address.model.js';
+
+@Table({
+  underscored: true,
+  timestamps: true,
+  tableName: 'mail_accounts',
+})
+export class MailAccountModel extends Model {
+  @PrimaryKey
+  @Default(DataType.UUIDV4)
+  @Column(DataType.UUID)
+  declare id: string;
+
+  @AllowNull(false)
+  @Unique
+  @Column(DataType.UUID)
+  declare driveUserUuid: string;
+
+  @HasMany(() => MailAddressModel)
+  declare addresses: MailAddressModel[];
+}
diff --git a/src/modules/account/models/mail-address.model.ts b/src/modules/account/models/mail-address.model.ts
new file mode 100644
index 0000000..1d07754
--- /dev/null
+++ b/src/modules/account/models/mail-address.model.ts
@@ -0,0 +1,60 @@
+import {
+  AllowNull,
+  BelongsTo,
+  Column,
+  DataType,
+  Default,
+  ForeignKey,
+  HasOne,
+  Index,
+  Model,
+  PrimaryKey,
+  Table,
+  Unique,
+} from 'sequelize-typescript';
+import { MailAccountModel } from './mail-account.model.js';
+import { MailDomainModel } from './mail-domain.model.js';
+import { MailProviderAccountModel } from './mail-provider-account.model.js';
+
+@Table({
+  underscored: true,
+  timestamps: true,
+  tableName: 'mail_addresses',
+})
+export class MailAddressModel extends Model {
+  @PrimaryKey
+  @Default(DataType.UUIDV4)
+  @Column(DataType.UUID)
+  declare id: string;
+
+  @AllowNull(false)
+  @ForeignKey(() => MailAccountModel)
+  @Index
+  @Column(DataType.UUID)
+  declare mailAccountId: string;
+
+  @AllowNull(false)
+  @Unique
+  @Column(DataType.STRING(255))
+  declare address: string;
+
+  @AllowNull(false)
+  @ForeignKey(() => MailDomainModel)
+  @Index
+  @Column(DataType.UUID)
+  declare domainId: string;
+
+  @AllowNull(false)
+  @Default(false)
+  @Column(DataType.BOOLEAN)
+  declare isDefault: boolean;
+
+  @BelongsTo(() => MailAccountModel)
+  declare account: MailAccountModel;
+
+  @BelongsTo(() => MailDomainModel)
+  declare domain: MailDomainModel;
+
+  @HasOne(() => MailProviderAccountModel)
+  declare providerAccount: MailProviderAccountModel;
+}
diff --git a/src/modules/account/models/mail-domain.model.ts b/src/modules/account/models/mail-domain.model.ts
new file mode 100644
index 0000000..82746af
--- /dev/null
+++ b/src/modules/account/models/mail-domain.model.ts
@@ -0,0 +1,37 @@
+import {
+  AllowNull,
+  Column,
+  DataType,
+  Default,
+  HasMany,
+  Model,
+  PrimaryKey,
+  Table,
+  Unique,
+} from 'sequelize-typescript';
+import { MailAddressModel } from './mail-address.model.js';
+
+@Table({
+  underscored: true,
+  timestamps: true,
+  tableName: 'mail_domains',
+})
+export class MailDomainModel extends Model {
+  @PrimaryKey
+  @Default(DataType.UUIDV4)
+  @Column(DataType.UUID)
+  declare id: string;
+
+  @AllowNull(false)
+  @Unique
+  @Column(DataType.STRING(255))
+  declare domain: string;
+
+  @AllowNull(false)
+  @Default('active')
+  @Column(DataType.STRING(20))
+  declare status: string;
+
+  @HasMany(() => MailAddressModel)
+  declare addresses: MailAddressModel[];
+}
diff --git a/src/modules/account/models/mail-provider-account.model.ts b/src/modules/account/models/mail-provider-account.model.ts
new file mode 100644
index 0000000..5714268
--- /dev/null
+++ b/src/modules/account/models/mail-provider-account.model.ts
@@ -0,0 +1,43 @@
+import {
+  AllowNull,
+  BelongsTo,
+  Column,
+  DataType,
+  Default,
+  ForeignKey,
+  Model,
+  PrimaryKey,
+  Table,
+  Unique,
+} from 'sequelize-typescript';
+import { MailAddressModel } from './mail-address.model.js';
+
+@Table({
+  underscored: true,
+  timestamps: true,
+  tableName: 'mail_provider_accounts',
+  indexes: [{ unique: true, fields: ['provider', 'external_id'] }],
+})
+export class MailProviderAccountModel extends Model {
+  @PrimaryKey
+  @Default(DataType.UUIDV4)
+  @Column(DataType.UUID)
+  declare id: string;
+
+  @AllowNull(false)
+  @Unique
+  @ForeignKey(() => MailAddressModel)
+  @Column(DataType.UUID)
+  declare mailAddressId: string;
+
+  @AllowNull(false)
+  @Column(DataType.STRING)
+  declare provider: string;
+
+  @AllowNull(false)
+  @Column(DataType.STRING(255))
+  declare externalId: string;
+
+  @BelongsTo(() => MailAddressModel)
+  declare address: MailAddressModel;
+}