SMTP Issue
Hi all, for some reason my emails do not send anymore for anything authentication related. This did work before and I did not change anything. Its also not the rate limiting. Any ideas?
22 Replies
Look in the Auth logs for the call. I assume you are getting no errors?
Use the UI and send an invite to a user from that to confirm not app related.
Check your SMTP provider logs if they have them.
Will do & let you know ASAP! 🙂
"{"component":"api","error":"535 ...authentication rejected","level":"error","method":"PUT","msg":"500: Error sending email change email","path":"/user","referer":"https://site_here/\",\"remote_addr\":\"82.74.1.42\",\"request_id\":\"985d0be874250e5c-AMS\",\"time\":\"2025-09-27T18:26:00Z\"}"
"{"auth_event":{"action":"user_recovery_requested","actor_id":"d9004a4c-3e39-4552-bf7e-acfc63cc3734","actor_name":"name_here","actor_username":"email_here","actor_via_sso":false,"log_type":"user"},"component":"api","error":"535 ...authentication rejected","level":"error","method":"POST","msg":"500: Error sending recovery email","path":"/recover","referer":"https://site_here/reset-password\",\"remote_addr\":\"82.74.1.42\",\"request_id\":\"985d0dab87ca66e5-AMS\",\"time\":\"2025-09-27T18:27:13Z\"}"
Same happens when sending through UI
So in the details of the auth log event there should be a specific error message.
OH, it is in what you posted.
error": "535 ...authentication rejected",
Yes.
I assume it's that
But honestly I have no clue why it started doing that
1 hour ago it worked
Have you checked your provider to see if it has info. Maybe you are exceeding some free quota?
No reports of anyone getting sudden issues here or github.
Hmm lemme see if I can find stuff like that on GoDaddy
The only other user to mention godaddy smtp here. Not your same issue though.
https://discord.com/channels/839993398554656828/1145323315544719441
Yep, changing the port didn't work either unfortunately
You could switch back to built in to make sure not something wrong with your instance. But if in production sort of a pain. The error is pretty clear though the provider is rejecting the connect info.
Yeah, I am currently in a live chat with them, most definitely its due to GoDaddy, I'll let you know.
You guys have built in things for smtp that work better as recommendation?
"you guys" this is a user helping user forum.
No the built in is too limited for production.
I see most here on the big email players. Brevo and Resend come to mind but Supabase has a list somewhere.
Sorry, I got taken away by your nice purple role x)
Thanks for those 2, I can remember I indeed saw a list somewhere before setting it up.
Two of the mods (including myself) use Brevo. It has a decent Free plan depending on how big your app is.
Aha, im a bit new to all the SMTP stuff. Is it possible to use that with a domain name from GoDaddy? As my e-mail is created there, or should I get e-mails through Brevo too in that case? Sorry if this doesn't belong in this discord.
Normally for an SMTP provider it either works stand alone, or you prove you have a domain your app is hosted on by setting some domain records it the setup process. There is no connection to SMTP email and the actual domain provider. Those records can be set on GoDaddy's domain side unless you have the domain connected to another hosting provider.
I use GoDaddy for domain registration only so not really sure what all it offers otherside.
Great, they checked everything and send me back to Supabase
Love it xd
Not much more we can do for you here. So it would be support next.
I'm skeptical it being Supabase though as it was working for you and no one else is suddenly having issues.
Another option to try would be to restart your instance... but it takes a few minutes.
Already tried that either, unfortunately
I think I'm just heading to bed and hope it will work out of nothing tomorrow just like it stopped working today
Who knows
Sometimes that works 😎
Haha, thanks anyways! If this doesn't solve it Brevo it is
Switching to brevo worked 😄