On 17 February 2017 at 19:38, Fazzina, Angelo <angelo.fazz...@uconn.edu> wrote: > Hi, > I thought the master.cf file is where you config what protocol to listen for ? > > Submission or SMTPS > > I'm no expert either, just curious what your setup is. > -ALF > > -Angelo Fazzina > Operating Systems Programmer / Analyst > University of Connecticut, UITS, SSG, Server Systems > 860-486-9075 > > -----Original Message----- > From: owner-postfix-us...@postfix.org > [mailto:owner-postfix-us...@postfix.org] On Behalf Of Chris Green > Sent: Friday, February 17, 2017 10:43 AM > To: postfix-users@postfix.org > Subject: Different treatment of ports 465 and 587 between postfix versions > 2.9 and 3.1 > > I am running postfix 3.1.0 on an xubuntu 16.04 system and postfix 2.9.6 > on a Raspberry Pi running Debian. > > They seem to act very differently as regards the use of ports 465 and > 587 and I'd like things clarified so I can understand better. > > I use both postfix installations to send outgoing E-Mail (i.e. mail > which is leaving my home LAN) to my hosting company's servers. Their > documentation says that I should use port 465 and TLS to connect to > the SMTP server. > > ... > Ah, I've maybe just spotted the reason, smtp_tls_wrappermode is new in > postfix 3, is that what makes the difference? I'd still like a simple > explanation though! :-)
see http://www.postfix.org/TLS_README.html#client_smtps - use stunnel for postfix <3.0 (it still works for postfix >=3.0)
