On Sunday 17 Nov 2002 9:52 pm, Jordan Thompson wrote: > Hi all, > OK, now that I think that everything is working (I'l find out for sure > tomorrow when I try to access my mail server from outside my ISP) I want to > control who sends mail through my smpt server. What is the best way to do > this? I guess I have two thougts: > 1) change the port number > 2) implement passwords for sending mail > > What is anyone's thoughts on either of these and how hard are they to > implement. > > thanks, > Jordan
By default Postfix will only relay mail for users on the local network (to avoid spammers taking over your mail server). So without having to do *anything* you are pretty secure. (By relay, I mean accept a mail and forward it on to another mail server) It is also possible to configure Postfix to allow connections only from named hosts. But if you want the most secure method of allowing selective users to access your mail server from outside your local net. the safest way IMO is to only allow SMTP over SASL. There is a good tutorial on sasl at http://www.mandrakesecure.net/en/docs/postfix-sasl.php and a good ssh tutorial http://www.mandrakesecure.net/en/docs/openssh.php derek
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