Max Deferrals Limit

This limit based on the maximum percentage of failed or deferred messages a domain may send per hour. The system examines outgoing mail over the last hour to determine whether the domain has exceeded the limit. When a domain exceeds the limit, it cannot send mail until enough time has passed so that the domain is back under the limit.

The shared servers are set to a failure ratio of 75%. The tool is hardcoded to track deferrals/failures after 5/5 have been reached for the past hour.
Once the limit and 75% failure ratio have been hit, ALL mail for the domain will fail until the ratio drops below 75%. This will happen after the earliest failure(s) roll off the beginning of the hour.

No bounces until 5/5 messages (for the hour) are reached, from that point on it’s 75% of the messages they send. If they are over 5/5 and 75%, further messages will immediately bounce and drop (they will not be re-queued), even if they are good messages.
This is a defense the server needs to avoid abuse – even spammers/hackers get lucky when they blast out illegitimate e-mail. Having a larger number of failures is suspicious not only to your local mail server, but to remote recipients as well.

If you have hit the limit, please check your domain email delivery from Track delivery to ensure your email is not compromised and sending spam email. You may refer this link on how to check : https://help.serverfreak.com/en/article/how-to-track-email-delivery-in-cpanel-4dtnqh/

If you saw any suspicious email send out please immediately reset the email password. If more than 1 email account are sending spam email please reset all email password and reset cpanel password to a strong password

Note : Kindly contact our support team if you need further assistance. support@serverfreak.com
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