SPF Missing Flag
Sender Policy Framework
It is used to allow server to send mail on behalf of domain.
SPF TX Record is like a DNS record
But what if a domain wont have any SPF record. Any server can send mail on behalf of the domain.
STEPS to check a domain have SPF or Not:
Enter your domain there without http / https / www , because its a domain based search.
If there is missing SPF record, then send mail via https://emkei.cz/
Prevention:
Correct the SPF entry.
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