Using Reverse Lookups to Reduce Spam

To the unfamiliar, the ‘Reverse Lookup’ might sound like something you’d see in one of Tom Daley’s diving routines.

However in email and DNS terms, it’s an essential security check which can dramatically reduce the amount of spam you’re seeing. It’s also one of those many tricky DNS areas that causes confusion so I hope this post will help demystify it a little.

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