To change outlook you need modify each user's outlook as described here:
http://wiki.contribs.org/Email#Outlook.2FOutlook_Express_give_error_10060.2F0x800CCC90(yes, this post looks like it's talking about outlook express, but the steps look pretty close to what I remember for Outlook).
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My comments about adding 10.1.1.0 as a "local network" on your SME assumed that your network looks like this:
Internet
|
Juniper_SSG----SME (172.16.10.x)
|
LAN_(10.1.1.x)
With network settings similar to the following:
SME LAN:
* IP 172.16.10.x
* Netmask 255.255.255.0
* Gateway: 172.16.10.1
SME Additional "Local Network":
* Network: 10.1.1.0
* Netmask: 255.255.255.0
* Router: 172.16.10.1
LAN Wkstn:
* IP: 10.1.1.x
* Netmask: 255.255.255.0
* Gateway: 10.1.1.1
Juniper_SSG:
WAN: (unspecified)
DMZ: 172.16.10.1 / 255.255.255.0
LAN: 10.1.1.1 / 255.255.255.0
If any of this is not how your network is configured then my earlier instructions would not solve your problem.