What Is SPF Hard Fail?

What does SPF hard fail mean?

-all = If the SPF check fails, the result is a hard failure.

Most mail systems will mark an inbound message as spam if the SPF check results in a hard failure.

?all = If the SPF check fails, the result is neutral.

This is typically used for SPF testing and not typically used for production domains.

What does SPF fail mean?

~ SoftFail, an IP that matches a mechanism with this qualifier will soft fail SPF, which means that the host should accept the mail, but mark it as an SPF failure.

What is hard fail?

hard failure. [′härd ′fāl·yər] (computer science) Equipment failure that requires repair by a person with specialized knowledge before the equipment can be put back into operation.

What does all mean in SPF record?

An SPF record is a Sender Policy Framework record. It’s used to indicate to mail exchanges which hosts are authorized to send mail for a domain. It’s defined in RFC 4408, and clarified by RFC 7208.