RE: Server Response 550 5.7.1 Message Rejected even though we auth

From: JTT (JTT_IMIT_at_nospam.postalias)
Date: 03/18/05 

Date: Thu, 17 Mar 2005 21:15:03 -0800

Pat-

You nailed it, I would've never thought to look at the PIX as the problem.
My brother-in-law works for Cisco and in chatting with him tonight he said
this issue is resolved in version 7 of the PIX IOS. Unfortunately it isn't
released yet, but will be soon.

I truly appreciate all your help with this error and I hope that others find
the posts useful as well.

Thanks Again,

JTT

""Pat Cai[MSFT]"" wrote:

> I have tested both SMTP and POP3 connection. The POP3 server can work
> properly. However, I cannot log on the SMTP server. I get the same symptom
> as what is described in this KB article:
>
> 320027 Cannot send or receive e-mail messages behind a Cisco PIX firewall
> http://support.microsoft.com/?id=320027
>
> Try this step from both internal and external connection: In the console
> mode, run command:
>
> telnet YourServerName 25
>
> to log on the SMTP server. Would you see the same welcome banner? It seems
> that the external connection will be blocked the firewall in front of your
> Exchange server. So please temporarily disable the firewall to further test
> this issue.
>
> If the problem can be solved by allowing all relay on the SMTP virtual
> server, can you see the correct banner from external logon at that time?
>
> Regards,
>
> Pat Cai
> Microsoft Online Partner Support
>
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