IP Freq module: Could not select() on MTA socket: socket fd(1133) is >= to FD_SETSIZE(1024)

book

Article ID: 210199

calendar_today

Updated On:

Products

Messaging Gateway

Issue/Introduction

When the number of active SMTP connections exceeds 1024, the mail service may begin to generate warnings from the IP frequency module / connection classification indicating that the file descriptor set size is larger than expected.

Cause

select() is being called on a file descriptor set with more than 1024 entries

Resolution

This warning message can be safely ignored and does not represent an operational issue with the connection classification feature or mail processing. 

This warning message has been removed in versions 10.7.5 and later.