All the ports except 80/443 should be unmasked.
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What is the difference between ~all, ?all, and -all in an SPF?
Below is the difference between ~all, ?all, and -all. -all means that any server or sender's IP...
Which information is included in DMARC?
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Which information is included in DKIM?
In order to sign a DKIM record, the sender must identify which fields they want to include in the...
Can I create a DMARC if the SPF and DKIM is not added?
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What is glue record?
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