Force SMTP through specific gateway

RouterOS General
1

Hi,

my setup contains 4 different internet provider. One provider is for usual traffic like browsing and downloading. Another one is for sending/receiving emails. I want all traffic of a specific dst.address to go through a specific gateway but I can’t find any ruleset which allows me to do this.
I’ve allready read http://wiki.mikrotik.com/wiki/Policy_Routing_in_RouterOS_2.9.x

Short:
eth1 = LAN
eth6 = VDSL
eth7 = SDSL

I’ve created a gateway 0.0.0.0/0 to use eth6 for all traffic. Now I want the traffic to 176.12.12.12 (f.e) to use eth7 for outbound. I was using pfSense till now and all I did was creating a firewall for dst.address 176.12.12.12 and ticking “use gateway blahblah” in extra options. That’s it. So how to implement this with ROS?

Best Regards,
Dominik

2

Accodring to your referenced wiki article I’d do it like this:

/ip firewall mangle add chain=prerouting dst-address=176.12.12.12/32 action=mark-routing new-routing-mark=example passthrough=yes comment="" disabled=no
/ip route add gateway=<gateway from mail-ISP> routing-mark=example disabled=no
/ip route rule add src-address=0.0.0.0/0 table=example action=lookup

-Chris