Guides
Email authentication guides
Practical, no-nonsense guides to SPF, DKIM and DMARC. Fix what is broken and keep your mail out of spam.
spf
How to Set Up an SPF Record
SPF lists which servers may send mail as your domain. Here is how to build the record correctly, end it with a strong policy, and stay under the lookup limit.
Jul 2, 20264 min read
spf
How to Fix the SPF Too Many DNS Lookups Error
SPF fails with a permerror once your record needs more than ten DNS lookups. Here is why it happens and three reliable ways to get back under the limit.
Jul 2, 20266 min read
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