Description
Failed to send the email and received a notification shows that You have been sending emails too frequently, or an unknown error occurred. Please try again later. And you may see the notice shows that This account is blocked from sending emails due to violations.


Cause
The sending has been restricted by the system due to the distribution of a large volume of spam or marketing emails.
The system limit is exceeded due to the high volume and frequency of emails being sent.
Solution
1. Please check whether the email content conforms to the specifications, and try again after modification.
If the email is not sent by yourself, please change the password in time and take good security precautions for the email account to prevent theft and avoid this situation from happening again.
2. Please regulate the sending behavior, stop sending marketing or promotion emails, and the restriction will be lifted automatically after a period of time. Meanwhile, replying emails will not be affected.
The Alibaba Mail is mainly to meet the normal communication needs. Currently, it does not support a large number of emails such as system notification, registration verification, exhibition invitation letter, monitoring alarm, etc. If you have similar email sending requirements, we recommend that you use the Direct Mail service provided by Alibaba Cloud.
3. Control the frequency and quantity of sending and standardize the sending behavior will automatically remove the sending restriction. For more information, please check Bounce Notification: too Frequently Sending.