feat: add Cloudflare Email Sending support

mail-worker/src/i18n/en.js

@@ -21,6 +21,7 @@ const en = {
 	totalSendLack: 'Not enough total remaining sends',
 	senderAccountNotExist: 'Sender email does not exist',
 	noResendToken: 'Resend API token not configured',
+	noSendProvider: 'Email sending service is not configured',
 	sendEmailNotCurUser: 'Sender email does not belong to current user',
 	notExistEmailReply: 'Mail does not exist and cannot be replied to',
 	imageAttLimit: 'The maximum number of image attachments is 10',

mail-worker/src/i18n/zh.js

@@ -21,6 +21,7 @@ const zh = {
 	totalSendLack: '剩余发送次数不足',
 	senderAccountNotExist: '发件人邮箱不存在',
 	noResendToken: 'Resend未配置，只能给站内邮箱发件',
+	noSendProvider: '发信服务未配置，只能给站内邮箱发件',
 	sendEmailNotCurUser: '发件人邮箱非当前用户所有',
 	notExistEmailReply: '邮件不存在无法回复',
 	imageAttLimit: '图片不能超过10个',

mail-worker/src/service/email-service.js

@@ -160,7 +160,7 @@ const emailService = {
 			text, //邮件纯文本
 			content, //邮件内容
 			subject, //邮件标题
-			attachments //附件
+			attachments = [] //附件
 		} = params;
 
 		const { resendTokens, r2Domain, send, domainList } = await settingService.query(c);
@@ -230,10 +230,11 @@ const emailService = {
 
 		const domain = emailUtils.getDomain(accountRow.email);
 		const resendToken = resendTokens[domain];
+		const useCloudflareEmail = !!c.env.EMAIL;
 
-		//如果接收方存在站外邮箱，又没有resend token
+		//如果接收方存在站外邮箱，又没有发信服务
-		if (!resendToken && !allInternal) {
+		if (!useCloudflareEmail && !resendToken && !allInternal) {
-			throw new BizError(t('noResendToken'));
+			throw new BizError(t('noSendProvider'));
 		}
 
 		//没有发件人名字自动截取
@@ -256,34 +257,40 @@ const emailService = {
 
 		}
 
-		let resendResult = {};
+		let sendResult = {};
 
-		//存在站外时邮箱全部由resend发送
+		//存在站外邮箱时，如果配置了 Cloudflare Email Service 就优先使用，否则使用 Resend
 		if (!allInternal) {
 
-			const resend = new Resend(resendToken);
+			if (useCloudflareEmail) {
-
+				sendResult = await this.sendByCloudflareEmail(c, {
-			const sendForm = {
+					name,
-				from: `${name} <${accountRow.email}>`,
+					accountEmail: accountRow.email,
-				to: [...receiveEmail],
+					receiveEmail,
-				subject: subject,
+					subject,
-				text: text,
+					text,
-				html: html,
+					html,
-				attachments: [...imageDataList, ...attachments]
+					attachments: [...imageDataList, ...attachments],
-			};
+					sendType,
-
+					messageId: emailRow.messageId
-			if (sendType === 'reply') {
+				});
-				sendForm.headers = {
+			} else {
-					'in-reply-to': emailRow.messageId,
+				sendResult = await this.sendByResend(resendToken, {
-					'references': emailRow.messageId
+					name,
-				};
+					accountEmail: accountRow.email,
+					receiveEmail,
+					subject,
+					text,
+					html,
+					attachments: [...imageDataList, ...attachments],
+					sendType,
+					messageId: emailRow.messageId
+				});
 			}
 
-			resendResult = await resend.emails.send(sendForm);
-
 		}
 
-		const { data, error } = resendResult;
+		const { data, error } = sendResult;
 
 
 		if (error) {
@@ -367,6 +374,104 @@ const emailService = {
 		return [ emailResult ];
 	},
 
+	async sendByCloudflareEmail(c, params) {
+		const sendForm = {
+			from: { email: params.accountEmail, name: params.name },
+			to: [...params.receiveEmail],
+			subject: params.subject
+		};
+
+		if (params.text) {
+			sendForm.text = params.text;
+		}
+
+		if (params.html) {
+			sendForm.html = params.html;
+		}
+
+		const attachments = await this.toCloudflareAttachments(params.attachments);
+		if (attachments.length > 0) {
+			sendForm.attachments = attachments;
+		}
+
+		if (params.sendType === 'reply' && params.messageId) {
+			sendForm.headers = {
+				'in-reply-to': params.messageId,
+				'references': params.messageId
+			};
+		}
+
+		const result = await c.env.EMAIL.send(sendForm);
+
+		return {
+			data: {
+				id: result.messageId
+			}
+		};
+	},
+
+	async sendByResend(resendToken, params) {
+		const resend = new Resend(resendToken);
+
+		const sendForm = {
+			from: `${params.name} <${params.accountEmail}>`,
+			to: [...params.receiveEmail],
+			subject: params.subject,
+			text: params.text,
+			html: params.html,
+			attachments: params.attachments
+		};
+
+		if (params.sendType === 'reply') {
+			sendForm.headers = {
+				'in-reply-to': params.messageId,
+				'references': params.messageId
+			};
+		}
+
+		return await resend.emails.send(sendForm);
+	},
+
+	async toCloudflareAttachments(attachments) {
+
+		const result = [];
+
+		for (const attachment of attachments) {
+			let content = attachment.content;
+
+			if (!content && attachment.path) {
+				const response = await fetch(attachment.path);
+				if (!response.ok) {
+					throw new BizError(`Attachment fetch failed: ${attachment.filename}`);
+				}
+				content = await response.arrayBuffer();
+			}
+
+			if (!content) {
+				continue;
+			}
+
+			if (typeof content === 'string' && content.startsWith('data:')) {
+				content = content.split(',')[1] || content;
+			}
+
+			const item = {
+				content,
+				filename: attachment.filename,
+				type: attachment.mimeType || attachment.contentType || attachment.type || 'application/octet-stream',
+				disposition: attachment.contentId ? 'inline' : 'attachment'
+			};
+
+			if (attachment.contentId) {
+				item.contentId = attachment.contentId.replace(/^<|>$/g, '');
+			}
+
+			result.push(item);
+		}
+
+		return result;
+	},
+
 	//处理站内邮件发送
 	async HandleOnSiteEmail(c, receiveEmail, sendEmailData, attList) {
 

mail-worker/wrangler.toml

@@ -19,6 +19,9 @@ enabled = true
 #binding = "r2"			#r2对象存储绑定名默认不可修改
 #bucket_name = ""		#r2对象存储桶的名字
 
+#[[send_email]]
+#name = "EMAIL"			#配置后站外发信优先使用 Cloudflare Email Service
+
 [ai]
 binding = "AI"