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Re:800M Email Addresses Leaked Online by Email Verification ... by css on Thursday March 07, 2019 @07:28PM (#19334041)
Been using a wildcard for one of my email domains for years (facebook@..., linkedin@... etc) and never once have I had issues with spam. Everything for services I dont care about goes through SpamAssassin on the mail server and items that pass get dumped to Gmail, where only "ham" messages will get forwarded through to my real inbox.
Re:800M Email Addresses Leaked Online by Email Verification ... by johnnyfaehell on Thursday March 07, 2019 @07:33PM (#19334071)
I think they were using their catch-all for non-transactional/newsletter emails. I have a catch-all for websites and then another that I give to people to email me on. This lets me see emails sent to me by a person easily while having separate email addresses for each site.
Re:800M Email Addresses Leaked Online by Email Verification ... by usrusr on Friday March 08, 2019 @05:13AM (#19336393)
Do you have catchall directly on the second level domain (@mydomain.com) or do you only catchall a specific subdomain (@mail.mydomain.com)? I'd expect a very big difference in the volume of blue sky spam between those two. If GP sbov has the catchall directly on mydomain.com, then restricting the value space to *.r will make a meaningful difference.

Having the "validating substring" in front of the @ will actually make it easier when you have to use the email address in vocal communication: many humans are unaccustomed to encountering more than one dot after the at.

Re:800M Email Addresses Leaked Online by Email Verification ... by css on Friday March 08, 2019 @12:16PM (#19339560)
Yep, directly on the second level domain. I do not use a mail subdomain.