>As far as I know, "msmtp" can be used >as a replacement for >/usr/sbin/sendmail to submit mail via >SMTP instead of writing it directly to >the queue
That was a suggestion of Viktor too, but I did not investigated further after reading the outdated description of a piece of software that seemed outdated too. Thanks for the originating link: last version of msmtp was indeed released last July. Promising: I'll test it. All the best.