Problems with static /ports command and E-mail

[scothaniel]

Having a little problem with mapping a single outside address to multiple inside address using the static command with ports specified. I have an outside address (208.10.114.1) that is specified in DNS as our Web and E-Mail server. I need to map this address to 2 separate servers on the inside LAN. Using the following config, I believe I have figured it out:

static (inside,outside) tcp 208.10.114.1

http://www 1.0.0.207

http://www netmask

255.255.255.255
static (inside,outside) tcp 208.10.114.1 smtp 1.0.1.16 smtp netmask 255.255.255.255

access-list acl_inc permit tcp any host 208.10.114.1 eq www
access-list acl_inc permit tcp any host 208.10.114.1 eq smtp

This appears to work, and the web requests go through, but there is an interesting problem with the E-Mail. The PIX appears to be assigning the E-Mail connections a NAT address and the mail server doesn’t recognize them. When I blow away the ports and just use the IP address, it appears to treat the address as a PAT and works with out a problem.
I would rather not go through the hassle of changing the DNS entries. Any suggestions would be great.

Thanks