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Event ID 4000 SMTPSVC Error.

My server is a SMTP smart host which diabled open relay. I have lots of bad mail in my c:\inetpub\mailroot\badmail (550 thousands bad mails in 2 months). the event log will generate event ID 4000

I open the bad mails and found that most of them are non delivery reply mail from my postmaster. I have disable NDR  


example 1
Message delivery to the remote domain 'boac.com.au' failed.  The error message is 'An SMTP protocol error occurred.
'. The SMTP verb which caused the error is 'RCPT'.  The response from the remote server is '550 5.1.1 <lhnslnvie@boac.com.au> is not a valid mailbox
'.

Example 2
Message delivery to the remote domain 'rrk.nu' failed for the following reason: The remote server did not respond to a connection attempt.

Example 3

Message delivery to the remote domain 'drillerssupply.com' failed for the following reason: Unable to bind to the destination server in DNS.
 
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dnack
Asked:
dnack
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1 Solution
 
Stacy SpearPresident/Principal ConsultantCommented:
These are NDR messages that your server tried to send in response to spam. If this is Exchange box go to your internet mail settings and disable NDRs to the internet. Enable the tar pit feature as well. http://support.microsoft.com/kb/842851
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Stacy SpearPresident/Principal ConsultantCommented:
You have windows 2000? That setting above doesn't work with it I think.
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SembeeCommented:
Exact version information would help, but if you are getting badmail then it sounds like you are on Exchange 2000. As already pointed out, recipient filtering the tarpit are not available in Exchange 2000.

It sounds like your server is being abused, via NDR spam. To deal with that you will have to go third party. I usually suggest Vamsoft ORF to help with that.
I would suggest that you read this question from earlier in the week. It is probably an identical problem.
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_22974202.html

Simon.
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dnackAuthor Commented:
i have 2 servers. I am using Imail as the mail sever and GFI Mail Essentail (anti Spam) as smtp gateway/smarthost. The error occurs on the SMTP gateway. tested no open reply,
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dnackAuthor Commented:
sorry, typpo error... i mean tested no open relay
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SembeeCommented:
Is there any Exchange server involved at all?
If not then you will need to look to see if there is any kind of recipient validation available in the iMail product. This could be via an LDAP lookup or similar. I am not familiar with iMail at all so don't know if it can support that.

Simon.
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