On Fri, Mar 30, 2007 at 09:41:15PM +1200, Chris Bannister wrote: > > Can you remember how to check if you are an open relay? I installed > telnet, just to test this :-), but as root when I try "telnet > localhost:25" I get: > telnet: could not resolve localhost:25/telnet: Temporary failure in name > resolution > Try "telnet localhost 25"
To check if you have an open relay, try and send email addressed To an address for which your server is not the final destination (like a Yahoo address) from a domain which your users don't use (again, like Yahoo). Do this without authenticating to the server. Also, if you have the my_networks set (depending on your other options) your Postfix may automatically trust anything from your network, regardless of its stated source and destination. In such a case, the best way to test is to use a host located outside your network. If you don't have such access, email me privately the hostname/IP address of the mail server and I will try and relay through it manually tonight or tomorrow and mail you the results. Regards, -Roberto -- Roberto C. Sánchez http://people.connexer.com/~roberto http://www.connexer.com
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