A person trying to receive mail from GreyMail services may be having trouble receiving mail from a specific email address, domain, or network.
GreyMail utilizes a handful of commercial grade antispam and antivirus filters that may catch the email and reject it. GreyMail will always reject the message, sending a bounceback to the sender.
Are you sure they spelled your email correctly?
Did you check your junk folder?
Is your email box full? You can identify this by small pie chart:
Message Rejected from Postmaster email sent to Sender
Please submit a ticket by clicking "submit a request" at the top and alert us of your situation. Please be specific as possible when reporting these types of issues.