how to allow pop3 from WAN1 and others from WAN 2

RouterOS General
1

Hello everyone

i need some help to configure my MikroTik RB to use WAN1 for (POP3) outlook only and the rest of usage should be from WAN 2.

2

If you want reach mail server outside you organization, you can use src-nat for this…

/ip firewall nat
add action=masquerade chain=srcnat disabled=no dst-port=25,587,465,110,995 \
    out-interface=WAN1 protocol=tcp
add action=masquerade chain=srcnat disabled=no src-address=YOUR-SUBNET-HERE  \
    out-interface=WAN2
3

thanks worked only for outlook POP3 and SMTP. but for Microsoft exchange give error

4

try to add …

dst-port=25,587,465,110,995,143,993
5

Hmm I did mine a little differently using IP routing.
WAN1 is primary (distance 2)
WAN2 is secondary (only used on failover) distance 10
However for all traffic with destination of IP address of email server,
(which smtp traffic resolves to via DNS) I have IP route rule that gives highest priority to secondary wan. distance 1

Not sure if that would be useful to you?