diff --git a/apps/server/src/modules/server/server.config.ts b/apps/server/src/modules/server/server.config.ts
index 09dd2210928..bec5dd2e4cc 100644
--- a/apps/server/src/modules/server/server.config.ts
+++ b/apps/server/src/modules/server/server.config.ts
@@ -5,6 +5,7 @@ import type { IAccountConfig } from '@modules/account';
 import type { IFilesStorageClientConfig } from '@modules/files-storage-client';
 import type { IUserConfig } from '@modules/user';
 import type { ICommonCartridgeConfig } from '@modules/learnroom/common-cartridge';
+import { IMailConfig } from '@shared/infra/mail/interfaces/mail-config';
 
 export enum NodeEnvType {
 	TEST = 'test',
@@ -19,7 +20,8 @@ export interface IServerConfig
 		IFilesStorageClientConfig,
 		IAccountConfig,
 		IIdentityManagementConfig,
-		ICommonCartridgeConfig {
+		ICommonCartridgeConfig,
+		IMailConfig {
 	NODE_ENV: string;
 	SC_DOMAIN: string;
 }
@@ -39,6 +41,9 @@ const config: IServerConfig = {
 	FEATURE_IDENTITY_MANAGEMENT_ENABLED: Configuration.get('FEATURE_IDENTITY_MANAGEMENT_ENABLED') as boolean,
 	FEATURE_IDENTITY_MANAGEMENT_STORE_ENABLED: Configuration.get('FEATURE_IDENTITY_MANAGEMENT_STORE_ENABLED') as boolean,
 	FEATURE_IDENTITY_MANAGEMENT_LOGIN_ENABLED: Configuration.get('FEATURE_IDENTITY_MANAGEMENT_LOGIN_ENABLED') as boolean,
+	BLACKLISTED_DOMAINS: Configuration.has('ADDITIONAL_BLACKLISTED_EMAIL_DOMAINS')
+		? (Configuration.get('ADDITIONAL_BLACKLISTED_EMAIL_DOMAINS') as string).split(',').map((domain) => domain.trim())
+		: ([] as string[]),
 };
 
 export const serverConfig = () => config;
diff --git a/apps/server/src/shared/infra/mail/interfaces/mail-config.ts b/apps/server/src/shared/infra/mail/interfaces/mail-config.ts
new file mode 100644
index 00000000000..fd2b0b75e56
--- /dev/null
+++ b/apps/server/src/shared/infra/mail/interfaces/mail-config.ts
@@ -0,0 +1,3 @@
+export interface IMailConfig {
+	BLACKLISTED_DOMAINS: string[];
+}
diff --git a/apps/server/src/shared/infra/mail/mail.service.spec.ts b/apps/server/src/shared/infra/mail/mail.service.spec.ts
index 6da86947a94..ebc77030252 100644
--- a/apps/server/src/shared/infra/mail/mail.service.spec.ts
+++ b/apps/server/src/shared/infra/mail/mail.service.spec.ts
@@ -1,8 +1,10 @@
 import { AmqpConnection } from '@golevelup/nestjs-rabbitmq';
 import { Test, TestingModule } from '@nestjs/testing';
-import { Configuration } from '@hpi-schul-cloud/commons/lib';
+import { createMock } from '@golevelup/ts-jest';
+import { ConfigService } from '@nestjs/config';
 import { Mail } from './mail.interface';
 import { MailService } from './mail.service';
+import { IMailConfig } from './interfaces/mail-config';
 
 describe('MailService', () => {
 	let module: TestingModule;
@@ -15,12 +17,15 @@ describe('MailService', () => {
 	};
 
 	beforeAll(async () => {
-		Configuration.set('ADDITIONAL_BLACKLISTED_EMAIL_DOMAINS', 'schul-cloud.org, example.com');
 		module = await Test.createTestingModule({
 			providers: [
 				MailService,
 				{ provide: AmqpConnection, useValue: { publish: () => {} } },
 				{ provide: 'MAIL_SERVICE_OPTIONS', useValue: mailServiceOptions },
+				{
+					provide: ConfigService,
+					useValue: createMock<ConfigService<IMailConfig, true>>({ get: () => ['schul-cloud.org', 'example.com'] }),
+				},
 			],
 		}).compile();
 
diff --git a/apps/server/src/shared/infra/mail/mail.service.ts b/apps/server/src/shared/infra/mail/mail.service.ts
index 637cb4e227f..466390010b3 100644
--- a/apps/server/src/shared/infra/mail/mail.service.ts
+++ b/apps/server/src/shared/infra/mail/mail.service.ts
@@ -1,8 +1,8 @@
 import { AmqpConnection } from '@golevelup/nestjs-rabbitmq';
 import { Inject, Injectable } from '@nestjs/common';
-import { Configuration } from '@hpi-schul-cloud/commons/lib';
-
+import { ConfigService } from '@nestjs/config';
 import { Mail } from './mail.interface';
+import { IMailConfig } from './interfaces/mail-config';
 
 interface MailServiceOptions {
 	exchange: string;
@@ -15,18 +15,10 @@ export class MailService {
 
 	constructor(
 		private readonly amqpConnection: AmqpConnection,
-		@Inject('MAIL_SERVICE_OPTIONS') private readonly options: MailServiceOptions
+		@Inject('MAIL_SERVICE_OPTIONS') private readonly options: MailServiceOptions,
+		private readonly configService: ConfigService<IMailConfig, true>
 	) {
-		this.domainBlacklist = this.getDomainBlacklist();
-	}
-
-	private getDomainBlacklist(): string[] {
-		if (Configuration.has('ADDITIONAL_BLACKLISTED_EMAIL_DOMAINS')) {
-			const domainBlackList = Configuration.get('ADDITIONAL_BLACKLISTED_EMAIL_DOMAINS') as string;
-			const domainBlackListArray = domainBlackList.split(',').map((domain) => domain.trim());
-			return domainBlackListArray;
-		}
-		return [] as string[];
+		this.domainBlacklist = this.configService.get<string[]>('BLACKLISTED_DOMAINS');
 	}
 
 	public async send(data: Mail): Promise<void> {