To decide if an email should be blocked/pre-blocked or not, the Esendex system examines several parameters including your sending history. The purpose is to anticipate deliverability problems and “block” an email from being sent when it has no chance of reaching the recipient’s inbox in order to avoid a negative impact on your sender reputation.

The most frequently seen reasons for blocked emails are listed below:

✓ A recipient reported your email as Spam

✓ The email address has already hard bounced in the past: Email Statuses

✓ An error in the Templating language. When using templating language features in the Esendex Email Editor, you may insert a syntax error. In this case the message will not be sent and will be marked as blocked in your statistics.

However, please note that this block is not permanent and if your next message to the same recipient doesn’t contain syntax errors in the templating language, it will be sent.

For assistance with troubleshooting such errors, please visit the following article: Email Statuses

To check why an email was blocked, go to the Stats page and click on the subject line of a blocked email. The “details” column will show the reason of the block.