On 29/12/2023 15.28, Ubence Quevedo (thatrat) wrote: > That’s just it, I am using mail from /opt/local/bin/: > uquevedo@ubence-mini-wired ~ % which mail > /opt/local/bin/mail > > I shouldn’t have to use a specific executable if it’s attaching to a > standard port for a running service…? > > Unless there’s something configuration wise that I’m not seeing about > what port the postfix from MacPorts is doing…?
mail(1) does not connect to port 25 or 587 by default, if you wanted to imply that. Unless you configured it differently, /opt/local/bin/mail might probably still use /usr/sbin/sendmail, but I am not sure about that. Depending on your macOS version, it already ships with postfix. The relevant sockets are already bound by launchd to run the macOS postfix installation on-demand. You won't see any running daemon processes as it is only activated by launchd on an incoming connection as configured in the /System/Library/LaunchDaemons/com.apple.postfix.master.plist file. There is no way to get rid of this postfix setup unless you disable System Integrity Protection (SIP). If your intention is just to set up a relay over an external SMTP server, you could just use the macOS provided postfix. I described such a setup on my personal blog a while ago with a specific setup that was required for macOS 10.12 Sierra, but the general instructions should still apply today: https://raimue.blog/2018/03/22/postfix-with-relayhost-over-stunnel-on-macos-10-12-sierra/ Rainer
