[ExchangeList] Re: SMTP issues

  • From: Prabhu Kamuni <prabhu2311@xxxxxxxxx>
  • To: exchangelist@xxxxxxxxxxxxx
  • Date: Sat, 20 May 2006 12:00:40 -0700 (PDT)

whats the authentication is required when a server is sending mail to other Internet mail server ?
Your exchange sgould have reverse dns address thts it i feel
Let me know , that would be helpful for everyone.

Jim Harrison <Jim@xxxxxxxxxxxx> wrote:
-------------------------------------------------------Not related to IMF at all.
"504 Need to authenticate first" - that's pretty clear; the destination
server requires authentication.
Have you defined that connector as requiring authentication?

-----Original Message-----
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew English
Sent: Saturday, May 20, 2006 10:56 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: SMTP issues


I am having some issues with the SMTP server, when it sends emails to
certain servers online it reports the following error:

This is an SMTP protocol error log for virtual server ID 1, connection
#702. The remote host "", responded to the SMTP command
"xexch50" with "504 Need to authenticate first ". The full command sent
was "XEXCH50 1036 2 ". This will probably cause the connection to fail.

I have yet to figure out why this is?? I am using Exchange 2003 with SP2
and IMF v2.


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