Cloudflare Developers•4mo ago

Is it possible to send mail in a worker ?

Hi, I'm looking to send mail from a worker where SMTP identifiers would be dynamic because I have several addresses from an API. I just realized that nodemailer seems to be a problem on workers. Is there an alternative?

3 Replies

Yakuzo•4mo ago

Error :

✘ [ERROR] service core:user:mail: Uncaught TypeError: globalThis.XMLHttpRequest is not a constructor

    at null.<anonymous> (index.js:15931:11) in checkTypeSupport
    at null.<anonymous> (index.js:15954:38) in
  node_modules/rollup-plugin-node-polyfills/polyfills/http-lib/capability.js
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19358:5) in
  node_modules/rollup-plugin-node-polyfills/polyfills/http-lib/request.js
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19577:5) in node-modules-polyfills:http
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19698:21) in node-modules-polyfills-commonjs:http
    at null.<anonymous> (index.js:12:50) in __require
    at null.<anonymous> (index.js:24482:16) in node_modules/nodemailer/lib/fetch/index.js

✘ [ERROR] service core:user:mail: Uncaught TypeError: globalThis.XMLHttpRequest is not a constructor

    at null.<anonymous> (index.js:15931:11) in checkTypeSupport
    at null.<anonymous> (index.js:15954:38) in
  node_modules/rollup-plugin-node-polyfills/polyfills/http-lib/capability.js
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19358:5) in
  node_modules/rollup-plugin-node-polyfills/polyfills/http-lib/request.js
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19577:5) in node-modules-polyfills:http
    at null.<anonymous> (index.js:9:56) in __init
    at null.<anonymous> (index.js:19698:21) in node-modules-polyfills-commonjs:http
    at null.<anonymous> (index.js:12:50) in __require
    at null.<anonymous> (index.js:24482:16) in node_modules/nodemailer/lib/fetch/index.js

Chaika•4mo ago

There's no way without relaying it through an external api (ex fetch a rest web server which handles the smtp part of things) Cloudflare supports TCP Egress only via through custom tcp socket stuff, not supported by many packages, and even then SMTP / 25 is blocked

Yakuzo•4mo ago

Okay, thanks for reply !

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Is it possible to send mail in a worker ?