Hi Guys,

  I'm running into an issue with users being unable to determine which 
recipient is causing "550 User unknown" responses from Courier.  Mozilla 
Thunderbird is the client and it sends via Courier SMTPS (port 465, user 
is authenticated).  If the user is sending to a large list and any of 
the addresses are local for the Courier server, Courier will of course 
check to make sure the local user actually exists (which is of course, 
good).  However, it's unclear (at least from Thunderbird's error 
message) which recipient Courier's 550 response is caused by.  
Thunderbird responds with an error popup:

An error occurred while sending mail.  The mail server responded:  User 
unknown.  Please check the message to recipients and try again.

I have verified that the error dialog's "User unknown" string returns 
exactly what Courier sends after the error code by changing the string 
in courier/module.local/local.c line 412.  What I'd like the error to 
say though is: "User <[EMAIL PROTECTED]> unknown" so that the end user can 
quickly identify their bad address and fix it.  But I'm not sure if 
that's the way to fix this, maybe Thunderbird should be a little more 
intelligent and realize that the "550 User unknown" response was due to 
the last "rcpt to:" it sent?  Still changing the error code in Courier 
would be the quickest fix.

Any thoughts here Sam?  Wanted to check with you before I file a 
bugzilla with Thunderbird.  I do know that at least one other SMTP 
Server (Mercury/32 4.52) returns the bad address in the 550 message.

Jay

-- 
Jay Lee <[EMAIL PROTECTED]>
Network/Systems Administrator
Information Technology Department
Philadelphia Biblical University
--


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