My forum has a lot of imported users that have a specific email domain that doesn’t work anymore.
A few thousand users have such an email address.
It was not an issue until now, but I increased suppress digest email after days value, and my forum sent a lot of digest emails, including to a lof of users having non-working email domains.
It led to too many bounces and mailgun disabled my domain.
What should I do with these accounts to prevent this and fix my issue? A lot of these accounts belong to legit users that didn’t come back to the forum yet. There are not necessarily abandoned accounts.
Because of this issue, users can’t register to the forum until it is fixed.