"Domain has exceeded the max defers and failures per hour (5/5 (26%)) allowed. Message discarded."

There are three major reasons for this message:

• Exploited or hacked sites sending out spam emails. A few customers who send out mass mailings have been triggering this feature, due to the number of bad/undeliverable email addresses on their lists.
• The disk quota for the email account/domain has been reached and new messages are being deffered.
• There is no such email account created on the mail server.

If you are on a Shared Server (cPanel) server, in case your account is infected please: Create a New Ticket to our technical support department.

If you are getting a non-existent email account, please make sure that your Mail Exchanger is set to  Local server or Remote server if it is supposed to work with a 3rd party external mail provider.

Note: To reset the limit per domain you need to remove the following file via root Shell access:

rm -f /var/cpanel/email_send_limits/max_deferfail_domain.com

*  domain.com = the domain where your messages are deffered