Well, of course I find the attribute after the fact, but....
Verify the milter bind port:
Code:
zmprov gs mail.server.com zimbraMilterBindPort
Should return the default 7026
Modify the milter bind port for MailArchiva (8092):
Code:
zmprov ms mail.server.com zimbraMilterBindPort 8092
Make other changes directly to the main.cf file and restart MTA: