I self host my private email server since 2005. Never had big problems. One time my server was wrong configured and then marked on spamhaus. Just fill in a form

I self host my private email server since 2005. Never had big problems. One time my server was wrong configured and then marked on spamhaus. Just fill in a form and all works fine again. Maybee gmail will blacklist me in some weeks, but fuck you gmail, I have nearby no one that uses a gmail account. I had in all this year no problem with any other peer. So, maybee the writer has just a malconfigured mailserver or don't know that he is marked on spamhaus because any reason.