[PLUG] Any email services have SMTP server on port 80?

[Tim Garton]

My guess is that his IT dept. blocks all outgoing ports except port 80 (and
maybe 443), so running on port 225, 587, 465, etc. aren't going to help.
And if his IT dept. is that controlling, I wouldn't be surprised if port 80
is redirected to a transparent proxy anyway, which means SMTP traffic isn't
going to get through even if it is on port 80.  If it's a low volume of
traffic, you may want to look at something like "httptunnel" to mask smtp
traffic as http traffic and then proxy it through your home machine or some
such.