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Hi All, Can't figure this. I Have internal mail server 10.0.x.x And then a the external interface of the gateway 192.168.x.x (This gateway is behind another gateway a nat within a nat). i have masquerade ok, Inet is served no problems iptables -A POSTROUTING -t nat -o eth0 -j MASQUERADE Forwarding enabled; net.ipv4.ip_forward= 1 mail is forwarding from the gateway to the internal mail server. iptables -t nat -A PREROUTING -p tcp --dport 25 -j DNAT --to 10.0.x.x:25 Everything else is bare back (ACCEPT), just while i get this to work. No mail can be sent out?? It just sits in the queue. Can't figure this. Surley i don't need a rule for mail going out, it should just route to the gateway? and with all being ACCEPT as well. I had this working another machine which has just died. Apologies in advance if i have missed the bloody obvious! Cheers, All How did the meeting go, i could not make it. ------------------------------------------------------------------ PGPmail - "Free encrypted secure offshore webmail" https://pgp.bz/ -- The Mailing List for the Devon & Cornwall LUG Mail majordomo@xxxxxxxxxxxx with "unsubscribe list" in the message body to unsubscribe.