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Email Comments, Questions and Miscellaneous Share your opinion of the email service you're using. Post general email questions and discussions that don't fit elsewhere. |
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20 Feb 2019, 09:19 PM | #1 |
Senior Member
Join Date: Dec 2002
Posts: 178
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Authentication and Deliverability?
Can anyone point me to real research or other evidence, not just claims and pronouncements, on the effect of SPF, DKIM, DMARC, etc. on deliverability?
Thanks. D. |
20 Feb 2019, 10:06 PM | #2 |
The "e" in e-mail
Join Date: Feb 2006
Location: EU
Posts: 4,943
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21 Feb 2019, 09:01 PM | #3 |
Master of the @
Join Date: Feb 2017
Location: USA
Posts: 1,722
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Not sure if any study could really give accurate numbers on deliverability with or without SPF, DKIM, or DMARC because how would you test? For example, if your organization sends lots of email to organizations with full DMARC you probably need it, but if you instead just send to random consumers, even millions of them, you probably couldn't detect much difference because you can guarantee that a high percentage of those emails will be going to Gmail and other massive providers. Gmail does probably include DMARC in its spam scoring, but obviously looks at lots of other things. For example, I find that both Gmail and Outlook put lots of legitimate emails into my spam folder, while other emails from the same sources do not go into spam. That indicates to me that Gmail is parsing the actual words used in the message. In other words, you could have SPF, DKIM, and DMARC all set up perfectly and your message still might not get delivered because of something you write in the email. I used to work for a large email service provider and we found that was exactly the case. Sometimes an email would not get delivered, and in some cases it was very hard to determine why when everything was configured correctly. Remember too, you are at the mercy of the receiver's set up, which you rarely have much chance of controlling.
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