Error 452-4.5.3: Domain policy size per transaction exceeded

Overview

The ‘Error 452-4.5.3’ often occurs when the email you’re trying to send exceeds the limit set by the recipient’s email server or your domain’s policy. This error can prevent emails from being sent successfully through your site. Particularly when dealing with large attachments or numerous recipients.

Causes

There are two main reasons why the ‘Error 452-4.5.3’ might occur:

1. Email size: The email, including attachments, exceeds the maximum size limit.
2. Too many recipients: The number of recipients in a single email exceeds the allowed limit.

Solution

To resolve the ‘Error 452-4.5.3’, try the following steps:

1. Reduce attachment size: Optimize and compress file attachments before including them in your email. Alternatively, you can host large attachments on a cloud server and share the link in the email instead.
2. Manage recipient lists: Split large recipient lists and send the email in smaller batches. Ensure you’re within the maximum number of email recipients set by your email service provider.
3. Consider bulk email services: Use an email service that allows you to set up a mailing list and send emails in bulk to your users.

That’s it! Now you know how to troubleshoot and fix the ‘Error 452-4.5.3: Domain policy size per transaction exceeded’ issue.

Would you like to improve your site’s email deliverability? Consider configuring an additional connection to use as a backup mailer.