Need some SMTP troubleshooting help - Please!.

[Richard Wilson]

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: <id at cornerstonehome.com>
(wait for response)
RCPT To: <id at yahoo.com>
(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...)
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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
> 
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