Monitoring SMTP error messages

[Terry Inzauro]

you could also use the check_log to moitor the logfile for the 451. 
(assuming that the error is being logged)  if not, it shouldn't be to 
difficult to throw somethig together using netcat to send a message to a 
dummy account and look for the error.



Luca Corti wrote:
> On Mon, 2004-11-15 at 17:41 +0100, Luca Corti wrote:
> 
>>Not at all. There's no disk space problem, the error comes from the fact
>>the message can't be stored on the disk due to the broken
>>spamassasin/f-prot chain. I really need to monitor for the 451 error
>>message, or better to monitor for the specific error message I get:
> 
> 
> Maybe I've not provided enough detail about the problem.
> 
> The check_smtp nagios plugin checks that a 220 smtp banner is sent from
> the server upon connection, it does not actually try to send a messasge
> or to ensure that a message woud be accepted.
> 
> In my case the smtp banner is correctly displayed by the server. The
> SMTP transaction goes as expected (MAIL FROM, RCPT TO, DATA) until the
> message DATA is terminated with the "." and the mailserver tries to
> queue up the message. At that point due to the breakage described above
> it fails, returning the 451 error.
> 
> Unfortunately I've not figured out yet what triggers the the error in
> the chain, so I need to detect it.
> 
> Here comes the plugin. It should be able to bring the SMTP conversation
> with the server and return OK if the mail is queued for delivery,
> CRITICALl if the mail is rejected with the above message.
> 
> Thinking about this more generally, it would be cool to have a plugin
> which returns CRITICAL if the mail is rejected with ANY error message.
> YOu could use this with a forged message you know yout MTA will accept
> to detect particular SMTP problems other than TCP/IP level or simple
> service availability ones.
> 
> thanks
> 
> Luca
> 
> 
> 
> 
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