Cybersecurity
DevOps Cloud
IT Operations Cloud
GWIA has poor options to secure GroupWise on the SMTP side and no SPAM and Virus protection.
So I recommend and use since years a Postfix an a small Linux Server or an existing SLES with enabled Postfix as a mail relay in front of quia
With Postfix you can add very good SPAM and Virus protection i.e. integrating RSPAMD Deamon. But evenPostfix itself has some posibilities to protct SPAM, i.e. blocking all mails without senders reverse pointer. In practice alone this blocks me up to 90% of SPAM mails.
I hope that will be helpfull
Regards
Rainer