Question : Dual ISP sharing

I currently have one Internet circuit (serial t-1) that is in use but we just purchased another from a different provider (2MB) (ethernet handoff).  We would like to use the t-1 connection for email traffic only and use the ethernet for all other traffic.  below is a layout of this part of our network.

T-1 Internet---|
                       |---cisco2621---DMZswitch--Pix525---3560Switch------3825Router(internal)
2MB Internet--|                                                                  |
                                                                                  Internal LAN


All equipment is cisco
below is the relevant part of the 2621's config

interface FastEthernet0/0
 description ISP2 (new)
 70.0.0.74 255.255.255.248
 shutdown
 speed 100
 full-duplex
!
interface Serial0/0
 description ISP1 T1
 ip address 64.0.0.62 255.255.255.252
!
interface FastEthernet0/1
 description  Inside Network
 ip address 64.0.0.113 255.255.255.240
 duplex auto
 speed auto
!
ip classless
ip route 0.0.0.0 0.0.0.0 64.0.0.63
no ip http server
ip pim bidir-enable

The Pix's 'outside' interface is 64.0.0.114/28 and uses 64.0.0.126 for its Global address.
Assume i have a 192.168.1.x internal address scheme.

My question is... how do i go about setting up the router an/or PIX to allow all email traffic to use the T1 and all other traffic to use the new 2MB pipe with the ehternet handoff?  If you need any additional info please ask. Thanks in advance for your help.

Answer : Dual ISP sharing

Route-map policy based routing (PBR) is the way to go:

\\ -- define traffic that is email
access-list 101 permit tcp any any eq smtp

\\-- define all other traffic
access-list 102 permit ip any any

\\-- create route-map to send two different types of traffic two different ways
route-map MYMAP permit 10
 match ip address 101
 set ip next-hop 64.0.0.63
route-map MYMAP permit 20
 match ip address 102
 set ip next-hop 70.0.0.xx  <== ISP2 gateway

\\-- create additional NAT for 64.x.x.x packets going out ISP2
interface Fast 0/0
 no shut
 ip nat outside
interface Fast 0/1
 ip nat inside
 ip policy route-map MYMAP
access-list 5 permit 65.0.0.114 0.0.0.240
ip nat inside source list 5 interface Fast 0/0 overload

Now you can also take it several steps further by adding service assurance for failover:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801d1e95.html