I have SBS 2008 with exchange 2007 on it.
Everything is working perfectly except that when I'm sending mail to one of my clients (only one domain example.com)
My mail stuck in queu.
I've used network monitor to trubleshoot the problem and I can see something like this (code belowe)
Why my server terminates connection?
Why it's not trying to use HELO command?
Who can I make it to work?
Client -> Me SMTP:Rsp 220 mx2.example.com ESMTP
Me -> Client SMTP:Cmd EHLO remote.mydoamin.com
Client -> Me SMTP:Rsp 402 4.5.2 Error: Command uknown
Me -> Client SMTP:Cmd QUIT, Terminates the mail session
Client -> Me SMTP:Rsp 221 2.0.0 Bye