Accidentally blocked Ezoic

Last year, I accidentally blocked Ezoic as they kept sending me an auto-reply and so did I, making it an unlimited loop.
But I forgot the app I used to block them and now I am unable to receive their messages.
Is there any way to unblock them?

Thank you a lot!

If it’s server side filtering, I’d say it’s either:

  • rspamd blacklist (labeled SpamAssassin) in DA, or SpamAssassin in cPanel
  • Sieve filters (editable in RoundCube), or
  • Filters in Crossbox (MXlogin)