Exchange 2016 TransportAgent; message deleted by transport agent

Question

Hello,

We have exchange 2016 CU20.

There are some mails with:

Source : AGENT
EventId : DROP
RecipientStatus : {[{LED=550 4.3.2 QUEUE.TransportAgent; message deleted by transport agent};{MSG=};{FQDN=};{IP=};{LRT=}]}

How do I trace, what agent and what is the reason of eventid DROP. (Exch 2016 doesn't have message trace in EOP)

Thank you in advance

Answer 1

Hi @Pero ，

Drop：

In your case, I think it's the second reason.
It could be deleted by the transport rules or some anti spam agents.

You could use the following command to check the details about the Drop Event:

Get-MessageTrackingLog -EventID Drop -MessageSubject "Subject" -Sender ******@domain.com -recipients ******@domain.com | FL  

If you have some transport rules or enabled the anti spam protection( like third-party security software), you may check them first.
Also you can provide the result of the above cmdlet with your information covered.

Best regards,
Lou

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Answer 2

Get-MessageTrackingLog -EventID Drop -MessageSubject "Subject" -Sender sender@keyman .com -recipients Recipient@keyman .com | FL

SourceContext : ScanMail Routing Agent <----- I really don't know how I missed it. It is antivirus software.
ConnectorId :
Source : AGENT
EventId : DROP

Thank you for response.