Email reports list attachments with a severity of "unverified" and an overall email verdict of "-3: scan timeout"
Last Modified: 10/11/2022
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Email reports list attachments with a severity of "unverified" and an overall email verdict of "-3: scan timeout"
Technical Articles ID:
KB92074
Last Modified: 10/11/2022 Environment
Advanced Threat Defense (ATD) Intelligent Sandbox (IS) Problem
ATD/IS email reports list attachments with a severity of CauseYour sender MTA sends multiple email messages over one SMTP connection. But, it sends them without closing the connection to the ATD/IS Email Connector between each send.
The Email Connector calculates the ATD/IS scan timeout by comparing the delta between the current time and the SMTP connection establishment time. It doesn't use the delta between the current time and arrival time of an individual email message.
The sender MTA reuses an SMTP connection without sending the
This time eventually exceeds your scan timeout setting value.
SolutionConfigure your sender MTA as below for delivering emails to the ATD/IS Email Connector:
NOTES:
Related InformationThe email report records the email verdict as
If you see the email verdict as
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