On Mon, 2006-10-30 at 18:44 -0700, Ashley M. Kirchner wrote: > How do I configure sendmail to listen (and use) another port, IN > ADDITION to port 25? Our outgoing mail server uses port 25 for internal > stuff, and for our remote users using authentication, I'd like them to > use port 2525 (specially since a few of them have port < 1024 blocked by > their ISP.) So I need to have sendmail be able to use both port 25 as > well as 2525 (or whatever other port number, 2525 just seemed logical.) ---- No ISP's block ALL ports below 1024. They block commonly used/exploited ports and prevent you from running your own servers...25, 80, 137, 138, 139, 445 check out this from /etc/mail/sendmail.mc dnl # The following causes sendmail to additionally listen to port 587 for dnl # mail from MUAs that authenticate. Roaming users who can't reach their dnl # preferred sendmail daemon due to port 25 being blocked or redirected find dnl # this useful. dnl # dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl dnl # dnl # The following causes sendmail to additionally listen to port 465, but dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1. dnl # dnl # For this to work your OpenSSL certificates must be configured. dnl # dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl dnl # This is where you need to go. Craig
