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mrfil13 -> SMTP inbound and outbound troubles (25.Jun.2008 7:14:15 AM)
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I have set up a small test network with ISA 2006 and 2 separate domains, one domain has exchange 2007 and the other has exchange 2003.
The exchange 2007 is on the internal side on an ip range of 10.0.0.0, the 2003 is external on 192.168.1.0. The internals gateway is 10.0.0.3, external is 192.168.1.3.
Now i have managed to get the 2007 to send email to 2003 fine, i can also send email from 2003 to 2007 fine but only if i create an access rule from external to internal allowing SMTP through.
If i point the DNS to the external side of the ISA box with a mail publishing rule with SMTP Server protocol, from external pointing to the 2007 server it is blocked with the default rule.
When looking at the monitor the traffic is coming in as SMTP not SMTP Server, so rather than appling the SMTP publishing rule its just blocking it. If i point the DNS to the internal server with the publishing rule it picks it up as SMTP Server protcol but obviously fails.
The network rules are set to route between internal and external. I did tried NAT but still no difference.
Anyone know what i have done wrong or why ISA thinks that traffic coming from the external side is been classed as outbound SMTP not in bound SMTP Server?
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