Hi, ok so i have 2 pppoe connections, 1 with dynamic ip and another one with a static ip, on the dynamic one the 25 port is blocked by isp,
192.168.10.0/24 is translated to the dynamic ip and 192.168.20.0/24 to the static one, how can i redirect all requests to port 25 from my dynamic ip to the static one since here the 25 port is not blocked?

Policy based routing specifically for that type of traffic. You already have it in place partly it sounds like since you have two subnets using two different internet connections.

Something like this.

Thank you sir