Your smtp (25) and submission (587) ports are serving a different
certificate, port 25 is serving the letsencrypt cert, but port 587 is
serving a self-signed certificate (which is what thunderbird is seeing):
depth=0 CN = mail.servicemouse.com
verify error:num=18:self signed certificate
verify return:1
depth=0 CN = mail.servicemouse.com
verify return:1
250 PIPELINING
DONE
CONNECTED(00000003)
---
Certificate chain
0 s:CN = mail.servicemouse.com
i:CN = mail.servicemouse.com
---
On 13/01/25 11:45, Scott K via Postfix-users wrote:
From my main.cf <http://main.cf>:
Show the output of `postconf -Mf`
Peter
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