I've had my Exchange 2010 working fine with the iPhones but too much spam so we got a Barracuda Spam firewall 100. Configured it per directions but now iPhones don't work.
I thought i'd reconfig the Cisco PIX to point inbound port 25 to the Barracuda. Cannot get that to work.
Config like this on Cisco:
PIX Version 6.3(5)
access-list inbound permit tcp any host xx.xx.xx.123 eq smtp
static (inside,outside) xx.xx.xx.123 192.168.1.7 netmask 255.255.255.255 0 0
Barracuda is at 192.168.1.8