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Old 01-27-2009, 09:32 PM   #1
Nullivex
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Registered: Jan 2008
Location: Colorado
Distribution: CentOS 5 & uBuntu 6.06, 7.10
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Sendmail 550 5.1.1 Reject Unknown User


Hello Everyone,

It has been a while since I have posted as there is usually no need to, but this problem is apparently beyond me.

Here is the information. The server is running Exim with Webppliance, now just recently like 2 days ago around 7pm the server stopped receiving mail. I was called on a referral. From what I know there has been no upgrades or any changes to the server.

Here is the a network tools analysis:
-------------------------
220 springshomes.springshomes.com ESMTP Sendmail 8.13.7/8.13.7; Tue, 27 Jan 2009 20:28:18 -0700
EHLO Network-Tools.com
250-springshomes.springshomes.com Hello network-tools.com [67.222.132.194] (may be forged), pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE 5000000
250-DSN
250-AUTH LOGIN PLAIN
250-DELIVERBY
250 HELP
VRFY bryan
252 2.5.2 Cannot VRFY user; try RCPT to attempt delivery (or try finger)
RSET
250 2.0.0 Reset state
EXPN bryan
502 5.7.0 Sorry, we do not allow this operation
RSET
250 2.0.0 Reset state
MAIL FROM:<admin@Network-Tools.com>
250 2.1.0 <admin@Network-Tools.com>... Sender ok
RCPT TO:<bryan@spearbuilders.com>
550 5.1.1 <bryan@spearbuilders.com>... User unknown
[Address has been rejected]
RSET
250 2.0.0 Reset state
QUIT
221 2.0.0 springshomes.springshomes.com closing connection

I have also done "sendmail -bv bryan@spearbuilders.com"
------------------------------------------------------------
sendmail -bv bryan@spearbuilders.com
bryan@spearbuilders.com... deliverable: mailer virthostmail, host spearbuilders.com, user bryan@spearbuilders.com

I have also visited the thread about it being the hostname. This does not apply and I have changed it and tested changed back. No luck. I have also messed with the local-host-domains with no luck.

I also cant send mail internally or externally so that rules out dns and I believe network tools proves dns is in good shape.

Any help would really be appreciated.

And I can post anything else that you guys need just let me know.
 
Old 01-28-2009, 12:21 AM   #2
datopdog
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Registered: Feb 2008
Location: JHB South Africa
Distribution: Centos, Kubuntu, Cross LFS, OpenSolaris
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The network tool is trying to use the VRFY smtp command which is not supported on that machine.

That does not mean the user does not exist, try using telnet to port 25 to see what is actually going on.
 
Old 01-28-2009, 12:25 PM   #3
Nullivex
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Registered: Jan 2008
Location: Colorado
Distribution: CentOS 5 & uBuntu 6.06, 7.10
Posts: 12

Original Poster
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Okay,

I will give that a shot.

If I use say squirrel mail on the server to send mail to someone else on the server, the mail says unknown user.

I will telnet in. What commands shall I issue?

Thanks,
Bryan
 
Old 01-29-2009, 01:56 AM   #4
Nullivex
LQ Newbie
 
Registered: Jan 2008
Location: Colorado
Distribution: CentOS 5 & uBuntu 6.06, 7.10
Posts: 12

Original Poster
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Any word on this.
 
  


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