For security reasons I would like to shut down traffic on all high numbered
outbound TCP ports. When I do this however I am no longer able to receive
inbound SMTP mail
I am using Exchange 5.5 SP4
Watchguard SOHO Firewall
I can watch the log on the firewall and as soon as I get inbound SMTP
packets from an IP address my Exchange server (I assume) responds with
outbound packets on randomly numbered ports ranging from 3500 to 60000. The
mail is never queued and seems to get lost in space.
Has anyone made this configuration work or does anyone know what is going
on? I am have searched Technet and can't find any related articles. I even
asked a Microsoft Tech Rep if he knew what was going on while I was trying
to resolve another issue and he said he had no idea what was happening.