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if you use the dns whats the configuration for the record mail.domain.gr
and are your sure that the router forwards the packets to your server.
to be sure use tcpdump.
and you need to explain your network more as acid_kewpie told you
here from netstat :
tcp 0 0 127.0.0.1:25 0.0.0.0:* LIST
I am MCSE , so i new a little about networking but have no idea from postfix.
I am sure that there is absolutely no problem with port at router or firewall etc.
Mistake has to be somewhere at postfix configuration
I think you've cut that line off. "LIST" should say "LISTEN" and there should be more after it listing the process that's attached to that port. the config says that is should listen on all interfaces, so if you've restarted the postfix daemon then that should say 0.0.0.0:25 to my knowledge, but it should also say that it is indeed postfix listening.
i have close the firewall..
I finally could log in from outside to my smtp with telnet but when i type ehlo domain name it stucks from outside but from inside network when i type ehlo i get response..
it seems like something to block outside connections maybe??
no..from outside my network...
I did a test user in postfix..i could finally sent message but when they try to reply to me they get 'relay access denied' messsage...
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