If you implement SPF, also implement SRS for forwarding addresses - if you have any. www.openspf.org points out the SPF gotchas and explains SRS.
http://www.openspf.org/Best_Practices/Forwarding http://www.openspf.org/SRS http://www.infradead.org/rpr.html has an example Exim implementation, although I'm sure there are newer examples floating around somewhere. SPF is widely [mis]used. Educate yourself on it's pros and cons before doing it yourself. -Ken ----- Message from [EMAIL PROTECTED] --------- Date: Wed, 5 Mar 2008 21:52:48 +0100 From: Andy Smith <[EMAIL PROTECTED]> Reply-To: Andy Smith <[EMAIL PROTECTED]> Subject: Re: [exim] Backscatter Spam Again. HELP PLEASE! To: [email protected] > Hi Grant, > > If you haven't done so already you should implement SPF for all domains > for which you send email. To be effective this also relies > on the recieving side server supporting SPF but its pretty widespread so > should have a very positive impact on your problem if > you arent already using it. The other good thing is its technically very > simple and easy to implement. > The site for this is www.openspf.org which explains what it does and how to > implement it, > > thanks, Andy. > > > ----- Original Message ----- > From: Author: Grant Peel > Subject: Re: [exim] Backscatter Spam Again. HELP PLEASE! > > >> >> >> Matt, Peter and all, >> No these are backscatter bounces. >> Non existent addresses on my server(s) are being sent SPAM with forged >> remote 'From:' addresses. Then, those spams are being bounced to the remote >> address' (from my servers)! >> -Grant > > > -- > ## List details at http://lists.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://wiki.exim.org/ > ----- End message from [EMAIL PROTECTED] ----- -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
