What is the default address? It is a catchall mailbox that receives all emails written to a non-existing name @ your domain. Why is this disabled? We disable Default Address because if you don't know how to use it, it can cause your account to flood with email. How do I enable it? Please contact AryanIct via phone or live chat and ask for your "catchall email to be enabled."  Once enabled, what do I do? Set every catchall to :fail: no such address here. This will prevent your account from filling up with unnoticed spam.