Yes, we send and receive on port 8081, not sure where 58081 is coming from....

Hi Zenworksb,

Here's the article that you are probably already familiar with, listing ports and processes: What Ports Does Symantec Mail Security for Microsoft Exchange Use?

Here's a sample netstat from a server that is not using Rapid Release or Premium Antispam:

  Proto  Local Address          Foreign Address          State           PID
  TCP    servername:8081        servername.domain.local:0   LISTENING       4
  TCP    servername:58081       servername.domain.local:0   LISTENING       3164

Those ports only need to be opened on the server itself.  I have never had to make any firewall adjustments if the SMSMSE Admin Console is on the same server. 

Please let the forum know if this has answered your query or if there is more detail needed!

Thanks and best regards,

Mick