> If you travel, or use your laptop at wireless hot spots, you’ve probably discovered that even though you can read your .Mac email using Apple Mail, many of these providers block access to SMTP, forcing you to send your messag…
> [MacOSXHints](http://www.macosxhints.com/article.php?story=20060113084246213&lsrc=osxh)
Basically if you’re at a public hot spot that blocks SMTP on port 25 try resetting your SMTP to use port 587.