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Re:The World's Longest Alphabetical Email Address (2004) by ValentineC on Friday May 15, 2020 @03:07PM (#23196092)
> The sub-domain is essential for catch-all, otherwise you get a crazy amount of spam.

Seconding this. I get a larger portion of targeted spam (addresses that I gave out in the past) with a sub-domain catch-all. At a normal second-level domain catch-all, I get more random spam addressed to common addresses like accounts@, billing@, and sales@.

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