Issue SMTP not working: certificate verify failed

[Blixary]

Server operating system version

Ubuntu 22.04

Plesk version and microupdate number

-

I am trying to set up the Shopware SMTP Mailer. Shopware and Plesk are not on the same server!



Using TLS as as encryption method I'm occuring following error with the SMTP Mailer provided by Symfony:


The domain has no certificate for mail encryption at the moment; but even with having it there's still this error.

Tools > TLS/SSL-Certificates looks like following:



Using "No encryption" in Shopware there is no error. The email gets send.

Does anyone have an idea how to fix that issue?

 

[whu]

I have a similar problem, a newly installed Lets Encrypt is not accepted by SMTP?! Incoming mail server took the new certificate! I can't get an encrypted connection via SMTP! Anyone have a solution for this? Thanks!

 

[Bitpalast]

If it's only a "similar" problem, it's likely a completely different problem. Please open your own, new thread and describe your issue in detail. Is it really about the SMTP mailer access that the thread initiator of this thread posted? If not, it's a different issue.