Problems Receiving Email after hooking up new router

[Gizmo2003]

Morning, all,

I have received and configured our new Cisco 2621XM router (my first router config in 5 years....and it's been a long time!), and all is working great, except that I cannot receive emails. When I say great, I mean great...the office can browse the Internet, remote users can access webmail, and you can send emails through our Exchange Server, but we are unable to receive email.

Right now, we are using a Linksys router to get by until this new router is up and running (the old one went to the great Cisco land in the sky this past weekend), and when connected with it, we can send and receive email. So, I have ruled out the server itself. Also, when connected through the linksys you can telnet into the mail server (closed out for relaying, of course). When I plug in the Cisco though, and I attempt to telnet to the smtp server, i receive an error stating port not open.

Here is my configuration. I thought I had everything I needed, however, I would be forever grateful if someone could point out the err in my ways...(I hope it is common here to remove external IPs, passwords, etc.)


Current configuration : 1524 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Metro2
!
enable secret password was here
enable password password was here
!
ip subnet-zero
no ip domain-lookup
!
!
interface FastEthernet0/0
description Interface connected to LAN
ip address 192.168.5.1 255.255.255.0
ip nat inside
duplex auto
speed auto
!
interface FastEthernet0/1
description Interface connected to Internet
ip address a.b.c.d 255.255.255.252
ip nat outside
duplex auto
speed auto
!
interface Ethernet1/0
description Interface connected to VPN
ip address a.b.c.d 255.255.255.240
ip nat outside
full-duplex
!
ip nat inside source list 1 interface FastEthernet0/1 overload
ip nat inside source static tcp 192.168.5.3 25 a.b.c.d 25 extendable
ip nat inside source static tcp 192.168.5.4 443 a.b.c.d 443 extendable
ip nat inside source static tcp 192.168.5.4 80 a.b.c.d 80 extendable
ip nat inside source static 192.168.5.2 a.b.c.d
ip nat inside source static 192.168.5.6 a.b.c.d extendable
no ip classless
ip route 0.0.0.0 0.0.0.0 a.b.c.d
ip route 192.168.0.180 255.255.255.255 192.168.5.2
ip route a.b.c.d 255.255.255.255 a.b.c.d
ip route a.b.c.d 255.255.255.255 a.b.c.d
no ip http server
no ip pim bidir-enable
!
!
access-list 1 permit 192.168.0.0 0.0.0.255
banner login ^C
!
!
end

Once again, if anyone sees something which may be causing errors here, please feel free to let me know!

Gizmo