Cloudflare Developers•11mo ago

How to setup mailchannels integration on Cloudflare Pages app with a custom domain?

I made it work on workers, nothing complicated there, but it doesn't seem to work with pages. Mailchannels just returns Error: Mailchannels API rejected: Failed to send email: 550 5.7.1 This sender is not authorized to send from.... I've set up the _mailchannels TXT record like this v=mc1 cfid=namespace.workers.dev cfid=namespace2.workers.dev cfid=customdomain.com and it still does not work with the custom domain.

9 Replies

maddsuaOP•11mo ago

Am I missing something?

Cyb3r-Jak3•11mo ago

Have you tried adding the pages.dev domain as an allowed one?

Erisa•11mo ago

this^ you need to add the projects pages.dev subdomain as the cfid, as that is where the function runs

maddsuaOP•11mo ago

gonna try that right now That's why we need the dev community =) Thanks folks! It's such an easy solution but still I didn't think of it

Rubi•11mo ago

hi @maddsua are you using MailChannels on production? have you experience any rate limit?

maddsuaOP•11mo ago

Hey! I don't send huge amounts of email, but I've seen stats with 100k successful requests per day. It's not like you're gonna lose something if you try it, right?

Rubi•11mo ago

all I need is just peace of mind in the weekend 😄

MylesBolton•8mo ago

would there be any other reason this error is getting thrown ? my txt record is

v=mc1 cfid=project.pages.dev cfid=namespace.workers.dev cfid=customdomain.com cfid=sub.customdomain.com

v=mc1 cfid=project.pages.dev cfid=namespace.workers.dev cfid=customdomain.com cfid=sub.customdomain.com

and the error i get back is

POST https://project.pages.dev/api/contact - Ok @ 08/04/2024, 16:08:17
  (log) Email send status: 500
  (log) Email send response: {
  errors: [
    'Failed to send email: 550 5.7.1 This sender is not authorized to send from customdomain.com. See https://bit.ly/domain-lockdown. cfid=project.pages.dev'
  ]
}

POST https://project.pages.dev/api/contact - Ok @ 08/04/2024, 16:08:17
  (log) Email send status: 500
  (log) Email send response: {
  errors: [
    'Failed to send email: 550 5.7.1 This sender is not authorized to send from customdomain.com. See https://bit.ly/domain-lockdown. cfid=project.pages.dev'
  ]
}

no idea why or how but it started working i thin the dns was cached and it was serving the previous record i set

Erisa•8mo ago

Please open a new topic instead of bumping an old one. You can reference this one in your new one by copying the link

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How to setup mailchannels integration on Cloudflare Pages app with a custom domain?