Sendmail relay behavior question:

From: Andrew Spartz (aspartzNOSPAM_at_pinenet.com)
Date: 04/24/04 

Date: Fri, 23 Apr 2004 19:33:28 -0500

I am confused as to how sendmail relays an email message to multiple
recipients on multiple servers.

For an example:
Using everyone's favorite client M$ Outlook, I send a message to two
recipients, not CC nor BCC, both are listed as recipients. The
addresses used are "me@myisp.com" and "me@hotmail.com"

"myisp" is misleading. It is no longer the isp I use for connectivity
(now broadband, but is instead an old email I have had for years. I do
not use the broadband provided SMTP because its performance is poor.

So far, so good. Or so I thought. The email gets through to the myisp
address, but never gets to hotmail. Buried in the logs for the day is
the following:

The original message was received at Tue, 13 Apr 2004 00:46:38 -0500
from [192.168.1.2]

   ----- The following addresses had permanent fatal errors -----
<me@myisp.com>
    (reason: 554 <me@hotmail.com>: Sender address rejected: Access
denied)

   ----- Transcript of session follows -----
... while talking to mail.myisp.com.:
>>> DATA
<<< 554 <me@hotmail.com>: Sender address rejected: Access denied
554 5.0.0 Service unavailable
<<< 554 Error: no valid recipients

Why is sendmail trying to relay through myisp? I thought each mail was
relayed directly to the server from the MX DNS record.

ARS

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