U00050028 SMTP-Server 'abc.company.com' hat Empfänger abgelehnt: 'sender@company.com'
I have the sneaking suspicion that most English speaking forum readers are less likely to encounter the titular message in
German (plus, the article itself has some German bits in it), so with the help of ucx.msl, let's translate that message:
SMTP server 'whatever.example.com' rejected receiver: '
sender@company.com'
("Receiver" of course meaning "recipient" ...).
The article does little to actually explain the true problem here: The receiving server has rejected the sender, usually this is based on anti spam rules. The most common reason is that the sender's IP address does not properly reverse-resolve in DNS, and/or does not have a properly resolving domain. Beyond that, one might bounce into any anti-spam measure known to man.
The solution usually is to use your organisation's properly DNS-registred mail server as a SmartHost, by configuring the local MTA on the machine Automic uses to send mails to relay via that Smart Host (Sendmail: DS macro, any other software: google is your friend).
Hth,