IonSwitch Blocked Port Policy

A - November 1, 2017


To protect our customers and infrastructure we may from time to time determine that it is neccesary to block certain network ports at the edge of our network.  This policy document will contain our current blocked ports list.


Port Direction Description
TCP/25 Outbound SMTP
TCP/465 Outbound SMTP 
TCP/587 Outbound SMTP
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