(Solved) My mail server is blacklisted?

Hi, this is my second post on this forum! I was trying out Disroot mail and found out that my mail server is blacklisted here. I can send mails to my server but can not recive any mails from that server. It would be really great if some admin could fix that! This is the hostname of the server: (gui.)nilsmail.ga


Solved, just recived my test mail after a looong time.:open_mouth:

its most probably due to greylisting: