Callum Millard wrote: [snip] > The problem is spam with a faked 'From:' field. Spammers are sending > e-mails to our domain with the 'From:' field set to a valid e-mail > address from our domain.[snip]
SPF was designed just for that, not only to prevent others from accepting fake messages that pretend to come from you, also for your server to do the same. I use milter-spiff with sendmail; postfix can also use milters. Of course SPF is not only the milter or SPF tests inside spamassassin, you have to set it up on your domain DNS master. [snip] -- René Berber
