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Not Delivered - Suspicious


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#1 Todd Harper

Todd Harper
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Posted 12 September 2017 - 02:56 PM

I am seeing several emails each day not being delivered with the reason 'Suspicious'.  when looking at the message log, clicking on 'show Details' it shows Deferred, Suspicious (name server for whatever.com), Not Delivered.

 

Not sure what is causing the deferred/suspicious based on the domain's nameserver.



#2 Michael Exner

Michael Exner

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Posted 12 September 2017 - 03:10 PM

Mail deferred for the reason suspicious is marked this way because it appears to be part of a mass mailing.

Mail servers will retry the mail and it will be delivered after a try or two

You can see the retries by your mail server by searching for the subject in the ESS message log.

If the mail server is not retrying the mail then that is a strong indication of spam.


Michael Exner
Product Lead Support Engineer
Barracuda Email Security
(408) 342-5300