On 5/16/08, James G. Sack (jim) <[EMAIL PROTECTED]> wrote: > Gus Wirth wrote: > > Set everything to go to smtp.gmail.com on port 25. However, most ISP's > > block port 25 except to their own servers... > > Hmmm, I didn't know that. Roadrunner doesn't. I wonder what proportion > of ISPs block outgoing smtp? [snip] > I wonder what the general stats are on availability of 587. > Also I suppose the intention of 25/587 use would explain why ISPs might > filter outgoing port 25 -- otherwise, I would wonder why ISPs filter > anything outgoing anyway?
It was my impression that this was to prevent their customers from using of open SMTP relays for sending spam, or at least to keep them from sending email through unknown (to the ISP) servers that may or may not be legitimate. ISPs that block port 25 outbound generally allow you to send port 25 through their own (authenticated) mail server, even if you're using a different "From" address than your ISP-provided email account. For Gmail, it's important to use their own SMTP server, because your sent mail automatically gets saved in their mail ecosystem (to be accessed by IMAP or the Web interface). -- Brad Beyenhof http://augmentedfourth.com Have the courage to be ignorant of a great number of things, in order to avoid the calamity of being ignorant of everything. ~ Sydney Smith, English essayist and preacher (1771-1845) -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
