A sender has received a bounced message.
In the Internet’s standard email protocol SMTP, a bounce message, is an automated electronic mail message from a mail system informing the sender of another message about a delivery problem.
A bounce back message occurs in the form of an e-mail that is sent to your account after the failure to deliver a message that you have attempted to send. This message is generated either by your mail server or the mail server that was the destination of your e-mail. Bounce back messages are a method to let you, the e-mail sender, know that something has happened to disrupt the delivery of your e-mail.
If the sender’s e-mail address or IP have been blacklisted by global anti-spam organizations, he should receive this information and instructions on how to proceed along with the bounced e-mail. If this is not the case, please make sure that:
- Your MX records are correct
- You have not exceeded your e-mail quota (if there is one for your e-mail account). The quota can easily be reviewed from your cPanel >Email Accounts – it should be represented by a bar, located next to each address on your hosting account.