- git@mydomain.com
Presumably harvested from GitHub or gitlab
- contact@mydomain.com / admin@mydomain.com
Not actually an email address ever used, presumably people just guessing these exist from convention.
- <first name>@mydomain.com
I mean, if you know my name you can probably guess this but also this has been my primary email address for outbound email and so has ended up in marketing lists etc.
- ap@mydomain.com, finance@mydomain.com
This is a very recent trend but I've been getting emails to made up addresses like these ones quoting forged emails from myself (with various titles like CEO or CFO attached) claiming to authorize payments to other parties, usually backdated, and then asking that I process their invoice ASAP because look how long ago the CEO said it should be paid. I guess my website has ended up in some list of businesses despite being a personal site.
Ironically, the address that was in plain text in my HN profile for like 15 years gets very minimal spam.