Mail DNS checks
What is checked
MX
Mail servers by priority, each with its IPv4 and IPv6 addresses.
SPF
The
v=spf1 record explained term by term, includes followed, DNS lookups counted against the limit of 10.DMARC
The
_dmarc record: policy, percentage, reporting addresses and alignment.DKIM
With a selector: the key type, key length and flags.
MTA-STS, TLS-RPT
Whether
_mta-sts and _smtp._tls records are published.To create records, use the SPF, DKIM and DMARC generators. To see whether your mail servers are on spam blocklists, use the blacklist check.