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freescout-help-desk / freescout

FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)
https://freescout.net
GNU Affero General Public License v3.0
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"Mail delivery failed" flood #4344

Open dabesa opened 2 days ago

dabesa commented 2 days ago

Today we changed email address of a mailbox. The new domain did not have SFP configured properly, and this triggered a flood of "Mail delivery failed" emails.

More than 2100 email notifications: https://paste.pics/6b508d5acb9e451b1ed9c3f68b98f0d3

I understand that FreeScout is sending notifications to all the users, but why is such a big loop generated?

It stopped when I set a wrong SMTP password and cleared the failed job queue, but in the meantime the SMTP server blocked our sender email so I'm not sure what really stopped the issue. Sorry I can't be more precise, but wondering if you have clues for such behavior.

PHP version: 8.1.30 FreeScout version: 1.8.156 Database: MySQL Are you using CloudFlare: No Are you using non-official modules: No

freescout-help commented 18 hours ago

Apparently your SMTP server was returning error or timeout while successfully sending the email.