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Outbound mail
Trick that works for me:
- Be able to SSH into a machine that has SPF records for your domain. We'll call this box "mail.server", for me it'd be mail.flutterby.com.
- Set up your mail program to use 127.0.0.1 and port 2525 for SMTP outbound mail.
- From your machine,
ssh -L 2525:mail.server:2525 mail.server - Send mail!
Works from any place you can get an outbound SSH connection, which nicely bypasses so many of those places that block outbound port 25. Bonus is that outbound mail is encrypted at least to a machine you trust.
Easier to do on modern platforms like the Mac and Linux boxes, a little harder from outdated klunkers like Windows, but PuTTY will tunnel.
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