On 5/18/2015 8:07 PM, Robert Morton wrote: > > Noel - Thanks for the reply. Please see my comments below. >
Use tcpdump or similar to see what's transmitted on the line. SMTP is a very simple protocol, but that's no excuse to implement it badly. Read RFC5321 (or start with the original RFC821) instead of trying to reverse-engineer it. You can test SMTP pretty easily by hand-typing with telnet or netcat. Surely there is sample java SMTP server code on the internet, and better forums for debugging your own code. I doubt your content_filter connection is encrypted. Use tcpdump to see what's being passed and you'll know for sure without having to guess. -- Noel Jones
