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Trouble getting outbound SMTP traffic working

cwoller

Hi.

I try to make outbound SMTP traffic working over port 3 instead of WAN port (2). My setup looks like this:

(green is inbound, this is working; purple is outbound, it is currently not working)

I already have a SD-WAN policy inplace, that gets my Wifi- and internal webtraffic (http+https) over Port 5. The same way I tried to setup outbound SMTP traffic:

  • Firewall rule that allows internal mail (within "Source networks and devices") server to ANY, protocol is SMTP, SMTP scanning is ON
  • SD-WAN Policy that has "Source network" = (internal mail server); "Destination networks": Any; "Services": SMTP; Primary Gatway: GW for Port3, override GW monitoring is ON, Backup GW is none.

What happend is that my SD-WAN policy gets ignored and everything is send out over first IP of WAN Port 2.

What I am doing wrong? The SD-WAN works perfectly for web related traffic but SMTP seams to get handled differently...



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