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Who rated this post

BPry
Cyber Elite
Cyber Elite

‎05-16-2020 07:29 PM

@Matthew_Crowson,

The firewall doesn't have any sort of "retry" mechanism like a normal SMTP transport, so if it can't connect to your SMTP relay when it attempts to connect you'll get the failure message. I would make sure that the communication between the firewall and your SMTP relay isn't being interrupted and that your SMTP relay is actually accepting the traffic the first time.  

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Who rated this post
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