Klaus

ssmtp --> msmtp

 Wed, 14 Aug 2019 13:49:15 +0200 
Why?

#^sSMTP - Debian Wiki
sSMTP - Simple SMTP
sSMTP is a simple MTA to deliver mail from a computer to a mail hub (SMTP server). sSMTP is simple and lightweight, there are no daemons or anything hogging up CPU; Just sSMTP. Unlike Exim4, sSMTP does not receive mail, expand aliases, or manage a queue.

Package is currently unmaintained
This package has been orphaned since 2019-03-19. msmtp can be used as an alternative.

:headdesk
 Docker