Re: Automatic email relay agent?
probably the best way to handle the "travelling user" need
is with
smtp-auth -- where the sending client authenticates.
look at/for the following lines in your 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.
the concept of temporarily adding a random/dynamic ipnumber isn't
very good as it open a (admittedly probably small) window that might
be able to be used by a spammer type should they come upon it.
Thank you very much for the help! I uncomment the line
DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
but, I have a question: if outlook express does not use port 587, then what to
do? How to make sure that if outlook express finds port 25 blocked, it will
try port 587?
What about the other line
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
does that help if it is uncomment too?
Thanks!
Hongwei