4 messages in net.sourceforge.lists.courier-usersRe: [courier-users] SMTP authentication
FromSent OnAttachments
Pavel M. RebrovMay 19, 2004 11:33 pm 
Robert HortonMay 20, 2004 8:48 am 
David NewallMay 20, 2004 11:53 am 
Robert HortonMay 20, 2004 1:06 pm 
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Subject:Re: [courier-users] SMTP authenticationActions...
From:David Newall (davi@rebel.net.au)
Date:May 20, 2004 11:53:52 am
List:net.sourceforge.lists.courier-users

On Fri, 2004-05-21 at 01:18, Robert Horton wrote:

Quick question: If I set up SMTP so that users have to use a password to send mail, would that end the flood of spammers attempting to use me as a relay?

Sounds horribly like spammers are succeeding in using you as a relay! Courier, out of the box, doesn't relay mail. You have to add an entry to (a file in) smtpaccess, specifying the IP addresses that are allowed to use you as a relay, for example

a.b.c/n allow,RELAYCLIENT

Hope you haven't got RELAYCLIENT for all addresses!

If you /have/ to allow relaying from any address, perhaps because you have roaming users, then you posilutely must require authentication! Absotively!