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Random Permanent Failures

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    Posted: 11 March 2010 at 9:39am
We're having an issue with SpamFilter terminating incoming mail with prejudice.
 
The error the sender receives is Remote host said: 557 The server encountered an error while processing this message. Please retry later.
 
That "557" is fatal - sending servers do not retry. And we end up looking like chumps.
 
Can anyone shed light on why an internal processing error would generate a permanent failure code instead of a temporary "4xx" error so emails could be re-queued by the sending system?
 
This issue is pretty random. I'll see it in a logfile along with hundreds of successful deliveries. Here's the SpamFilter excerpt of the event that triggers that 557 error...
 
03/11/10 05:16:54:265 -- (644) Connection from: x.x.x.x  -  Originating country : United States
03/11/10 05:16:55:171 -- (644) Received MAIL FROM: <sender@senderdomain.com>
03/11/10 05:16:55:249 -- (644) Received RCPT TO: recipient@example.com
03/11/10 05:16:55:265 -- (644) Resolving x.x.x.x - mail.senderdomain.com
03/11/10 05:17:02:515 -- (644) - SPF analysis for senderdomain.com done: - none
03/11/10 05:17:02:515 -- (644) Mail from: sender@senderdomain.com
03/11/10 05:17:23:515 -- (644) - MAPS search done...
03/11/10 05:17:23:515 -- (644) RCPT TO: recipient@example.com accepted
03/11/10 05:17:23:874 -- (644) Checking SFDC
03/11/10 05:17:24:218 -- (644) SFDC - Added x.x.x.x - Response: Error=0
03/11/10 05:17:24:234 -- (644) Exception occurred during RECEIVEMESSAGE: ( 1 2 2b 3 3a 4 5 6 7 8 9 11 12 13 15 16 17 18 18b 19 20b 20c 29 30 31 32 111) Access violation at address 00413B4E in module 'SpamFilterSvc.exe'. Read of address 00000005 --
03/11/10 05:17:24:312 -- (644) Disconnect
 
If we restart the service, things are smooth again for a few days. But this random rejection business is difficult to explain to customers. Any help greatly appreciated.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 11 March 2010 at 4:35pm
That should indeed not happen - it indicates a serious error within SpamFilter. Can you please zip and email us SpamFilter's activity logfiles for the day this happened and for the day prior to that so we can see what is happening? If the zip is over 8MB in size, please upload it to us via FTP. I'll send you the ftp login info via a PM.
Roberto Franceschetti

LogSat Software

Spam Filter ISP
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