When an email cannot be delivered, it is recorded as a bounce.
Hard bounce
The address does not exist or cannot receive email permanently. We stop sending to it.
Soft bounce
The address exists but had a temporary problem, such as a full mailbox. We may retry later.
Complaint
The recipient marked the email as spam. This hurts deliverability.
Suppression
After repeated failures or complaints, an address is suppressed and we stop sending to it.
What you should do
Keep your email address active and within its mailbox quota. Do not mark legitimate EpicHostly email as spam. If you see a suppression you did not expect, contact support.