What Is Causing This Error?
SMTP Error 451 signifies an exceeded allowable limit for sending emails, either within a specified hour or day. These limits, set by the server, ensure consistent email traffic and mitigate potential spam activities.
This error primarily occurs due to:
- Rapid email sending in a short duration.
- Exceeding the pre-set limits determined by the email server.
While the exact reasons for these limits can vary, they are fundamentally in place to maintain the server’s integrity and prevent misuse.
Resolving the Error – Solution
To address this error, it’s advised to wait; there’s no immediate fix.
The optimal approach is to let the sending limit reset. After this waiting period concludes, contacting the email server administrators can provide insights into the specific limits that are set in place.
That’s it! Now you know the common causes of the 451 error and how to resolve it.
If you’d like to learn how to troubleshoot other common errors, check out the following tutorials: