Thanks for all the input. It's clear I need to more closely examine this problem, as it's likely to be a problem with my setup. I wonder if it has something to do with using Cyrus IMAP and LMTP for delivery. Anyways thanks for all the the help.



--Aaron



David F. Skoll wrote:
On Sun, 13 Mar 2005, Aaron Paetznick wrote:


I noticed that since I started using MIMEDefang, sendmail won't give a 550
bounce to let the remote server know that the user doesn't exist.


That shouldn't be the case.  My machine Magnesium runs MIMEDefang:

$ telnet magnesium.roaringpenguin.com 25
Trying 192.168.10.12...
Connected to magnesium.roaringpenguin.com.
Escape character is '^]'.
220 magnesium.roaringpenguin.com ESMTP Sendmail 8.12.10/8.12.10; Mon, 14 Mar 
2005 08:23:42 -0500
HELO foo
250 magnesium.roaringpenguin.com Hello [192.168.2.3], pleased to meet you
MAIL FROM:<>
250 2.1.0 <>... Sender ok
RCPT TO:<[EMAIL PROTECTED]>
550 5.1.1 <[EMAIL PROTECTED]>... User unknown
QUIT
221 2.0.0 magnesium.roaringpenguin.com closing connection
Connection closed by foreign host.

Regards,

David.
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