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Old 23rd August 2012, 10:21
till till is online now
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Thats ok, postfix is listening on all interfaces.

So the connecion must be blocked by a firewall, this can be the firewall on the server itself. Test it with:

iptables -L

A firewall in a router in front of the server or a firewall of your internet acccess provider. Many providers block port 25 to avoid spam, so if your server is not located in a datacenter, then its likely that your provider blocks the smtp connections.
Till Brehm
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