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Welcome to Adminkit Q&A, where you can ask questions related to email delivery issues and receive answers from adminkit support or other members of the community.

Why does SMTP Diag Tool close the connection when TCP has zero window for >2s?

0 votes
When using this tool to test data throughput, one of the scenarios causes the TCP RX buffer to fill up on the client which can cause the TCP window to get down to 0.  I have noticed that if this remains for > 2seconds the connection is closed even though the client ACKs the zero window probes.

Is there a way to extend this timeout as I dont believe the connection should be closed so quickly.

asked Jul 30, 2014 by anonymous

1 Answer

0 votes
Please send a screen shot
answered Jul 30, 2014 by admin (2,920 points)