Hello, Embarrassing question time... was investigating use of port 587/submission in addition to our usual 465/smtps, but I found that our server is already listening on port 587. ALL of the "submission" lines in master.cf are commented out.
Surely I just goofed something up, but I'm not sure where to start to track down how postfix is listening on that port. I can verify that it is definitely the normal postfix instance because it's got our custom smtpd_banner and accepts mail via our SASL authentication and whatnot. What can I look at to investigate how submission listeners are being enabled? Thank you
