local relay

[cygus]

Hi,

How can I disable local relay (send email from local user to local user without auth) in Plesk 11?

Regards.

 

[cygus]

Any idea to fix this problem (this is postfix)?

 

[Faris Raouf]

How are your "local" users sending email? If they are using SMTP on port 25 then there's no way I can think of to stop a user sending email to a mailbox on the server without also stopping external email from being delivered.

You could prevent this by switching to an external mailserver, I suppose, and the blocking port 25 from all but the external mailserver's IP.

Maybe if you could let us know why you want to do this -- maybe there's some other way around your problem?

 

[cygus]

I can send email by telnet on port 25 but only from local user to local user.
I found one workaround of this problem by set sender check by hash (in main.cf) and configuring for local domain "permit_sasl_authenticated, reject".
IMHO it should be possible in plesk.

Regards.