GIT sendemail not working anymore

Hi,

could someone please give a hint?

Changing to IMAP and the new MUA settings worked, but now GIT is somehow fooling me.

No matter what I do, I always get an error while trying to use 'send-email':

Command: git send-email --annotate -1

Results: Unable to initialize SMTP properly. Check config and use --smtp-debug. VALUES: server=submissions.ipfire.org encryption=tls hello=Devel.localdomain port=465 at /usr/lib/git-core/git-send-email line 1514.

Or:

Unable to initialize SMTP properly. Check config and use --smtp-debug. VALUES: server=mail01.ipfire.org encryption=tls hello=Devel.localdomain port=587 at /usr/lib/git-core/git-send-email line 1514.

Using '--smtp-debug' gives me exact the same error. What am I doing wrong?

Best, Matthias