What are suppressions?

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 your domain → 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.

Get a daily summary of suppressions:

We can email you a summary of the destinations we suppressed for the day.

You can enable this by going to Domains → select your domain → Settings, then switching on Daily Suppression Summary.

The email lists each suppressed destination, why the receiving server refused it, and a link to unblock it.

We send it to the domain's notification email, or your account email if you haven't set one — only on days we suppressed something, and only for destinations we are still suppressing.

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