On Mon, Nov 10, 2008 at 6:59 PM, jfmxl <[EMAIL PROTECTED]> wrote: > My ISP was blocking port 25 outgoing, so I could send mail to my own > mailserver. It turned out that sendmail was listening on port 587 as > well, so I use that instead. > > I assumed my ISP was blocking outgoing port 25 to stop captured > machines from spamming. Why do you think yours stopped incoming port > 25? Probably just easier to block it in both directions?
My ISP blocks common incoming ports (25, 80) by default, presumably because they see much more abuse than legitimate use - just think of the number of people who run mail/www servers over residential broadband vs the number of people with potentially vulnerable windows machines. Fortunately for me, my ISP also provides an easy way to turn the filtering off. -sqweek
