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You can control what will happen in this case with a email standard called DMARC. It gives you the option to specify whether you require both or either of the checks to fail, before the message is marked as spam. Of course this have to be supported by the receiving mail server, but almost all of the major services and most of the MTA software supports it so ...


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Your DMARC record should be under _dmarc.procrastination.com. This is a new specification and not widely supported. If you want reports you also need a TXT record containing v=DMARC1 at *._report._dmarc.procrastination.com or procrastination.com._report_dmarc.procrastination.com. You will know this is working when you start getting reports. Both Google ...


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You cannot compel others to filter their incoming mail based on SPF and DKIM, or indeed any other criteria at all. If google chooses to ignore SPF, so be it; you've done your bit, all you can do now is sit tight and ignore any complaints from people who don't filter on SPF. That said, having a valid SPF record does tend to reduce backscatter, because a ...



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