メールアドレスの認証にverifymail.ioを使えるようにする。

packages/backend/migration/1700303245007-supportVerifyMailApi.js

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class SupportVerifyMailApi1700303245007 {
+    name = 'SupportVerifyMailApi1700303245007'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" ADD "verifymailAuthKey" character varying(1024)`);
+        await queryRunner.query(`ALTER TABLE "meta" ADD "enableVerifymailApi" boolean NOT NULL DEFAULT false`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "enableVerifymailApi"`);
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "verifymailAuthKey"`);
+    }
+}

packages/backend/src/core/EmailService.ts

@@ -13,6 +13,9 @@ import type Logger from '@/logger.js';
 import type { UserProfilesRepository } from '@/models/_.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { bindThis } from '@/decorators.js';
+import {URLSearchParams} from "node:url";
+import { HttpRequestService } from '@/core/HttpRequestService.js';
+import {SubOutputFormat} from "deep-email-validator/dist/output/output.js";
 
 @Injectable()
 export class EmailService {
@@ -27,6 +30,7 @@ export class EmailService {
 
 		private metaService: MetaService,
 		private loggerService: LoggerService,
+		private httpRequestService: HttpRequestService,
 	) {
 		this.logger = this.loggerService.getLogger('email');
 	}
@@ -160,7 +164,14 @@ export class EmailService {
 			email: emailAddress,
 		});
 
-		const validated = meta.enableActiveEmailValidation ? await validateEmail({
+		const verifymailApi = meta.enableVerifymailApi && meta.verifymailAuthKey != null;
+		let validated;
+
+		if (meta.enableActiveEmailValidation) {
+			if (verifymailApi) {
+				validated = await this.verifyMail(emailAddress, meta.verifymailAuthKey);
+			} else {
+				validated = meta.enableActiveEmailValidation ? await validateEmail({
 					email: emailAddress,
 					validateRegex: true,
 					validateMx: true,
@@ -168,6 +179,10 @@ export class EmailService {
 					validateDisposable: true, // 捨てアドかどうかチェック
 					validateSMTP: false, // 日本だと25ポートが殆どのプロバイダーで塞がれていてタイムアウトになるので
 				}) : { valid: true, reason: null };
+			}
+		} else {
+			validated = { valid: true, reason: null };
+		}
 
 		const available = exist === 0 && validated.valid;
 
@@ -182,4 +197,65 @@ export class EmailService {
 			null,
 		};
 	}
+
+	private async verifyMail(emailAddress: string, verifymailAuthKey: string): Promise<{
+		valid: boolean;
+		reason: 'used' | 'format' | 'disposable' | 'mx' | 'smtp' | null;
+	}> {
+		const endpoint = 'https://verifymail.io/api/' + emailAddress + '?key=' + verifymailAuthKey;
+		const res = await this.httpRequestService.send(endpoint, {
+			method: 'GET',
+			headers: {
+				'Content-Type': 'application/x-www-form-urlencoded',
+				Accept: 'application/json, */*',
+			},
+		});
+
+		const json = (await res.json()) as {
+			block: boolean;
+			catch_all: boolean;
+			deliverable_email: boolean;
+			disposable: boolean;
+			domain: string;
+			email_address: string;
+			email_provider: string;
+			mx: boolean;
+			mx_fallback: boolean;
+			mx_host: string[];
+			mx_ip: string[];
+			mx_priority: { [key: string]: number };
+			privacy: boolean;
+			related_domains: string[];
+		};
+
+		if (json.email_address === undefined) {
+			return {
+				valid: false,
+				reason: 'format',
+			};
+		}
+		if (json.deliverable_email !== undefined && !json.deliverable_email) {
+			return {
+				valid: false,
+				reason: 'smtp',
+			};
+		}
+		if (json.disposable) {
+			return {
+				valid: false,
+				reason: 'disposable',
+			};
+		}
+		if (json.mx !== undefined && !json.mx) {
+			return {
+				valid: false,
+				reason: 'mx',
+			};
+		}
+
+		return {
+			valid: true,
+			reason: null,
+		};
+	}
 }

packages/backend/src/models/Meta.ts

@@ -446,6 +446,17 @@ export class MiMeta {
 	})
 	public enableActiveEmailValidation: boolean;
 
+	@Column('boolean', {
+		default: false,
+	})
+	public enableVerifymailApi: boolean;
+
+	@Column('varchar', {
+		length: 1024,
+		nullable: true,
+	})
+	public verifymailAuthKey: string | null;
+
 	@Column('boolean', {
 		default: true,
 	})

packages/backend/src/server/api/endpoints/admin/update-meta.ts

@@ -113,6 +113,8 @@ export const paramDef = {
 		objectStorageS3ForcePathStyle: { type: 'boolean' },
 		enableIpLogging: { type: 'boolean' },
 		enableActiveEmailValidation: { type: 'boolean' },
+		enableVerifymailApi: { type: 'boolean' },
+		verifymailAuthKey: { type: 'string', nullable: true },
 		enableChartsForRemoteUser: { type: 'boolean' },
 		enableChartsForFederatedInstances: { type: 'boolean' },
 		enableServerMachineStats: { type: 'boolean' },
@@ -454,6 +456,18 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.enableActiveEmailValidation = ps.enableActiveEmailValidation;
 			}
 
+			if (ps.enableVerifymailApi !== undefined) {
+				set.enableVerifymailApi = ps.enableVerifymailApi;
+			}
+
+			if (ps.verifymailAuthKey !== undefined) {
+				if (ps.verifymailAuthKey === '') {
+					set.verifymailAuthKey = null;
+				} else {
+					set.verifymailAuthKey = ps.verifymailAuthKey;
+				}
+			}
+
 			if (ps.enableChartsForRemoteUser !== undefined) {
 				set.enableChartsForRemoteUser = ps.enableChartsForRemoteUser;
 			}

packages/frontend/src/pages/admin/security.vue

@@ -73,6 +73,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 						<MkSwitch v-model="enableActiveEmailValidation" @update:modelValue="save">
 							<template #label>Enable</template>
 						</MkSwitch>
+						<MkSwitch v-model="enableVerifymailApi" @update:modelValue="save">
+							<template #label>Use Verifymail API</template>
+						</MkSwitch>
+						<MkInput v-model="verifymailAuthKey" @update:modelValue="save">
+							<template #prefix><i class="ti ti-key"></i></template>
+							<template #label>Verifymail API Auth Key</template>
+						</MkInput>
 					</div>
 				</MkFolder>
 
@@ -132,6 +139,8 @@ let setSensitiveFlagAutomatically: boolean = $ref(false);
 let enableSensitiveMediaDetectionForVideos: boolean = $ref(false);
 let enableIpLogging: boolean = $ref(false);
 let enableActiveEmailValidation: boolean = $ref(false);
+let enableVerifymailApi: boolean = $ref(false);
+let verifymailAuthKey: string | null = $ref(null);
 
 async function init() {
 	const meta = await os.api('admin/meta');
@@ -150,6 +159,8 @@ async function init() {
 	enableSensitiveMediaDetectionForVideos = meta.enableSensitiveMediaDetectionForVideos;
 	enableIpLogging = meta.enableIpLogging;
 	enableActiveEmailValidation = meta.enableActiveEmailValidation;
+	enableVerifymailApi = meta.enableVerifymailApi;
+	verifymailAuthKey = meta.verifymailAuthKey;
 }
 
 function save() {
@@ -167,6 +178,8 @@ function save() {
 		enableSensitiveMediaDetectionForVideos,
 		enableIpLogging,
 		enableActiveEmailValidation,
+		enableVerifymailApi,
+		verifymailAuthKey,
 	}).then(() => {
 		fetchInstance();
 	});