Please use a personal email. My email is ‘mail’ @ ‘my actual name’. It does not get more personal than that
But you can’t use emails starting with mail@, admin@, support@, info@, main@, etc.
Instead they advised me (3 times) to create a personal email on a service like Yahoo, Outlook, Gmail, Orange, etc
You can still spam with user1@domain.tld, user2@domain.tld etc and it takes basically no extra effort
Spamming user+1@gmail, user+2@gmail takes absolutely no technical knowledge whatsoever - anyone can do it with 1 gmail account.
Spamming user1@domain, user2@domain etc requires 1 of two things:
you can sign up for multiple email accounts using a third party service. You’re going to run into trouble with Gmail or other big providers if you start creating accounts en masse.
you create your own email server. this requires someone with selfhosting knowledge and some basic coding (or rather server config) experience.