Incoming Mail Error

Anyone ever had this error bounce back to them before? If so, what is the root cause for this?

An error was detected while processing a file of BSMTP input.
The error message was:

421 SMTP incoming data timeout - message abandoned

The SMTP transaction started in line 0.
The error was detected in line 3.
0 previous messages were successfully processed.
The rest of the batch was abandoned.
421 SMTP incoming data timeout - message abandoned
Transaction started in line 0
Error detected in line 3

 

 

 

 

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