Am 09.07.2012 18:30, schrieb Benny Pedersen: > Den 2012-07-09 17:20, Curtis Maurand skrev: >> This has probably been asked in the past, but is it worth it to go >> through the contortions to set up SPF? > > have you ever got bounces back from remote ip with your domain as > envelope sender ? > > much better question that answers your question > > seen in dmarc some spammers use my domain in message-id and from: > header, maybe just to test how bad spf is used ? > > >
in real world setups it deeply depends what you want i have one domain with strict spf dkim an dmarc records this domain is heavy spammed but with less recipients all other domains have spf as test like hotmail also dkim but no special dmarc in dns i.e hotmail.com. 3600 IN TXT "v=spf1 include:spf-a.hotmail.com include:spf-b.hotmail.com include:spf-c.hotmail.com include:spf-d.hotmail.com ~all" strict spf has its problems with mail lists by breaking forward so this may rise your users support, but its good to have it in testing mode for income check at big mailers, also it helps little on backscatter you should always use dkim this days ( see it faqs ) dmarc is kind of overhead to spf and dkim, again read its faqs by what you want, recent i found no big advantage with dmarc, but this must not be the same at your side at income check i do spf only selective on some domains on a few servers, also there are many broken spf dns setups outside so its up to you ,choose what fits to your needs -- Best Regards MfG Robert Schetterer
