Problems with e-mail receiving
Probably the main reason why You cannot receive mail is the absence of MX-records for the domain.
MX-record is the type of record used in DNS indicating how to route e-mail. This record provides the appropriate server intended for the users’ e-mail in this particular domain.
How it works
To solve the problem with e-mail receiving, You need to:
It should be noted that effects after changing of DNS records will take some time (from 15 minutes to 2 hours or more).
If you were unable to find answer for your question, please write to firstname.lastname@example.org