Re: [msmtp-users] TLS failure

[grarpamp <grarpamp@...20...>]

This might be because your server is asking for client
certs and supplying an [long] list of acceptable CA's. And your
msmtp may be linked to openssl libs which interprets
that. And msmtp appears to be considering something
therein an error instead of continuing with the session
as raw gnutls/openssl clients would. Or you're genuinely timing
out. See:
- ldd msmtp
- openssl s_client -connect mail.smart-cactus.org:587 -starttls smtp
-showcerts -msg -debug
 [Acceptable client certificate CA names]
 [...]