What are suppressions?

Why does ImprovMX suppress my emails and how can I unblock them?

A suppressed email address is a destination address that ImprovMX has stopped attempting to forward to.

We suppress destinations to:

  • Reduce repeated bounces and retries.
  • Protect IP reputation and overall deliverability by avoiding sends to known-bad destinations.

Common reasons an address is suppressed could be that the destination address does not exist, the destination has a history of bouncing or a temporary recipient problems, such as "Mailbox full" or " Quota exceeded".

There are two types of suppressions:
  • Temporary suppressions that may clear automatically if delivery starts succeeding again (we re-check periodically).
  • Permanent suppressions that do not clear automatically.
How to check and clear a suppression:

Go to Domains → select domains Settings→ Suppressions

In the table, you will see:

Suppressed email address: the blocked destination

Reason: why suppression was applied (like the bounce code and message)

Expiration: how long a suppression will remain in place before it is removed.

  • Temporary suppressions show a countdown (for example, 6d 23h)
  • Permanent suppressions need to be manually removed.

Remove suppression: an Unblock button to remove specific suppression

You can use Unblock all to remove all suppressions for that domain.

Still have questions? Feel free to reach out to our support team.

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