You can check your IP address on dnsstuff.com -- one of their services checks to see if you're listed on any of 200+ Antispam services. You can also try a manual session, doing a telnet to a.mx.mail.yahoo.com (or any of their other mail relays -- "dig yahoo.com mx" will give you the list) and seeing what it is they don't like about you (I assume conerstonehome.com in the example that follows): telnet a.mx.mail.yahoo.com 25 (wait for CONNECT msg) HELO mailserver.cornerstonehom.com (wait for 2XX response) MAIL From: (wait for response) RCPT To: (wait for response) DATA send something here . QUIT You may get a 4XX ("soft"/temp) or 5xx (Hard) reject on one of the responses that should indicate why they don't like you. HTH, Richard Wilson (yes I have the "privilege" of getting mail addressed to postmaster at too darn many domains...) --------------------------------------------------------------------------- On Wed, 2008-03-12 at 19:23 -0700, Bryan O'Neal wrote: > Ok I have a problem in that I am (still) unable to send anything to > Yahoo, or any domain who's email is hosted by Yahoo. I don't get a NDR, > it is as if I simply can not connect and I get nothing in my logs! I > believe it is connection oriented because three boxes (Two exchange > domains and one sendmail) with three external IP's have one common point > and that is one border router with one T1 connection. But I can not get > any response out of Yahoo and I can not give any details because I have > never had to trouble shoot down to this level before. > > Any suggestions on how to figure out what the *&!@$#! is going on with > my SMTP connections to Yahoo? > > Bryan O'Neal > Cornerstone Homes & Development, Inc. > 4220 E. McDowell Rd Ste. #108 > Mesa, AZ 85215 > (480) 505-1900 > http://www.cornerstonehome.com > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss