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Email1 min readUpdated

DNS for email: MX, SPF, DKIM and DMARC

What each record does, examples, and the mistakes that send order emails to spam.

Four DNS records decide whether your email arrives and stays out of spam.

RecordTypeWhat it does
MXMXWhere email for the domain is delivered.
SPFTXT on the domainWhich servers may send email for the domain.
DKIMTXT on <selector>._domainkeyA signature that proves the email was not changed and comes from you.
DMARCTXT on _dmarcWhat receivers do when SPF or DKIM fail, and where they report.

Examples

example.com.          MX   10 c12345.shopwhizzyhosts.com.
example.com.          TXT  "v=spf1 a mx ip4:203.0.113.10 ~all"
_dmarc.example.com.   TXT  "v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com"

Copy the exact DKIM record from the Email tab: it is long and unique to your domain.

Only one SPF record per domain. If you also send through Google Workspace, Microsoft 365 or a newsletter tool, merge them into one record: v=spf1 a mx ip4:203.0.113.10 include:_spf.google.com ~all.

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Emails not arriving: how to find out whyOrder emails missing or in spam: the checks in order, from the store's queue to the receiving server.1 min read

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