Re: Listening on 587 but submission not enabled in master.cf
> Embarrassing question time... was investigating use of port 587/submission inEven more embarrassing answer - that's what I get from testing using telnet from a windows computer. I guess the firewall software redirects port 587 to port 25 or some weird thing like that.
> 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?
Testing from elsewhere shows that in fact there is no submission listener enabled. Whew.
Sorry for the noise!