What is this error?
If you are receiving an error similar to “Domain example.com has exceeded the max defers and failures per hour (5/5 (100%)) allowed“ in an email bounce back, it means that outgoing email from your domain has triggered a rule in the server that will stop any further email from going out of the server. This happens when a domain account sends out emails to wrong or failed email address that exceeded server limit.
Why they is a limit the defers email?
The default limit is typically sufficient for the majority of users. The limit is common practice in the web hosting industry. This is to prevent malware or automatic email scripts that allowed spammer to make use your email to send spam.
How can I fix this?
Stop sending Email for 1 hour. The blockage will be released.
How to prevent this from happen?
- To control / limit the numbers of email sent.
- to check / verify all the email before send. Make sure they are valid
What option do I have if I need to send more Email
- Get your own cloud server / dedicated server. Shared hosting are strict limit
