# Purging mail queues
{% hint style="info" %}
**Purge all undelivered mail**
You can purge all undelivered broadcast, funnel, and transactional mail in the backend customer account table.
{% endhint %}
**Click customers -> Customer Accounts**
**Check the customer account whose mail you want to purge:**
**Use the action menu to purge mail queues:**
{% hint style="warning" %}
**The most reliable way to cancel a broadcast in progress is always to purge broadcast mail from the backend customer account menu.**
{% endhint %}
{% hint style="danger" %}
Clicking "Cancel" in the Actions button from the broadcast page will cancel a broadcast sent through Velocity MTA, but may not be able to cancel a broadcast sent through an API or SMTP Relay connection depending on the state of the data transfer at that time.
{% endhint %}
{% hint style="info" %}
To manage Velocity MTA mail queues see the [MTA documentation](/docs/velocity-mta-continuing-education/complaint-feedback-loops.md).
{% endhint %}
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