Ok, I am now testing MTA interaction with my smtpd server.
Sendmail barfs. Here is what I posted to comp.mail.sendmail:
I've written a custom MTA and I testing interaction with it from other MTA's.
It seems sendmail (8.11.6 and whatever AOL is using) doesn't like my MTA, but Yahoo and Exim does. Here's a smtp log:
/usr/lib/sendmail -v firstname.lastname@example.org Subject: testing sendmail
This is a test from sendmail . email@example.com... Connecting to somehost.e-dialog.com. via esmtp... 220 e-dialog smtpd server $Id: smtp.c,v 1.14 2001/12/18 19:56:38 me Exp $ >>> EHLO server1.somedomain.com 250 server1.somedomain.com Hello, how are you? somehost.e-dialog.com. config error: mail loops back to me (MX problem?) >>> QUIT 250 Good bye firstname.lastname@example.org... Local configuration error /home/jeff/dead.letter... Saved message in /home/jeff/dead.letter Closing connection to somehost.e-dialog.com.
I don't understand why I'm getting the MX error. That is printed out by sendmail, I'm not generating it in my SMTP server. The only thing I can think that may be tripping up sendmail is that I'm doing 3 writes, one for the 250, one for the server name, and one for the message "Hello, how are you?" when I send send a response to ehlo.
Thank in advance for any pointers.
Like the message states, any pointers would be great. You can send email to me at email@example.com.