Views:

To resolve the issue, change the Traffic Throttling settings:

For "IP-based throttling ", the "Maximum messages: " should be larger than "Maximum connections:" (one connection can send multiple emails).
For "Sender-based throttling", increase the value of "Maximum messages: " (maybe 500, IMSVA calculates the traffic for the entire group, not just one IMSVA).

Keywords: 451 4.3.5 Server configuration problem,Interscan Messaging Security Virtual Appliance,IMSVA,MTA,postfix,problem talking to server 127.0.0.1:999: Connection timed out,Connection reset by peer,tlsagent,Traffic Throttling,IP-based,Sender-based

"451 4.3.5 Server configuration problem" error message appears in InterScan Messaging Security Virtual Appliance (IMSVA)

Product / Version includes:

Interscan Messaging Security Virtual Appliance9.1

Last updated: 2023/08/10

Solution ID: KA-0011560

Category: Configure , Troubleshoot

Summary

The following are warnings and error messages encountered while querying postfix logs:

"warning: problem talking to server 127.0.0.1:999: Connection timed out"
"451 4.3.5 Server configuration problem"
"warning: problem talking to server 127.0.0.1:999: Connection reset by peer"

To resolve the issue, change the Traffic Throttling settings:

For "IP-based throttling ", the "Maximum messages: " should be larger than "Maximum connections:" (one connection can send multiple emails).
For "Sender-based throttling", increase the value of "Maximum messages: " (maybe 500, IMSVA calculates the traffic for the entire group, not just one IMSVA).

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