554 5.1.8 Email Outgoing Blocked - what I should do?

554 5.1.8 Email Outgoing Blocked - what I should do?

Hello,

my e-mail notariusz@janicka.eu has e-mail outgoing and ingoing blocked. What I should do? I bought Standard Plan, because I crossed the storage limit of Free Plan (5 GB). Now I have 6 / 30 GB, but still everything is blocked.

Best Wishes!