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Old 11-13-2003, 01:39 AM   #1
Registered: Oct 2003
Posts: 176

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how can I make postfix more secure?

right now it seems like anyone can telnet into my server and send out. Is there a way so it will require authentication? or maybe only a certain range of ip can connect?
Old 12-04-2003, 11:10 PM   #2
Registered: Nov 2003
Distribution: RH, Fedora, Debian, Knoppix
Posts: 436

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Yes. You should only allow your internal network to connect. By default, it is configured that way. To test out, try to connect from the internet and try to send an e-mail to a domain that is not hosted on this machine. You should get a relay_denied error. If it relays, you must do something to prevent relaying. See /etc/postfix/


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