How to Delete Mailboxes in InboxKit

InboxKit allows you to safely delete mailboxes while ensuring you do not lose any unused value from your subscription or credits. Deleting a mailbox follows a scheduled cancellation system, which means the mailbox continues to work until shortly before the next renewal—so you get full usage of what you’ve already paid for.

This guide explains how to delete a mailbox, the difference between admin and non-admin mailbox deletion, and what happens after deletion.

📍 Step-by-Step: How to Delete a Mailbox

1. Go to Your Mailboxes

1. Open your InboxKit dashboard

2. Click Mailboxes from the left sidebar

3. Find the mailbox you want to delete

4. Click More on the right side of the mailbox row

5. Select Settings

2. Scroll to the Danger Zone

At the bottom of the mailbox settings page, you will see the Danger Zone section.

3. Click “Remove Mailbox”

• For non-admin mailboxes, you will see:
  Remove Mailbox

• For admin mailboxes, you will see:
  Remove Admin Mailbox (with a warning)

🕒 What Happens After You Delete a Mailbox?

1. The mailbox is scheduled for cancellation

The mailbox is not deleted immediately.
Instead:

• It stays active until a few hours before the next renewal.

• This ensures you get the full value of your paid billing period.

2. After scheduled cancellation, the mailbox is permanently deleted

Once the renewal date arrives, the mailbox is fully removed from the system.

🟢 Deleting Non-Admin Mailboxes (Standard Mailboxes)

If you delete a non-admin mailbox:

• The mailbox is scheduled for deletion as described above

• Your domain setup remains intact

• Your subscription mailboxes (slots) open up again

  • Example: If you had 10 mailbox slots and delete 1 mailbox → you now have 1 free slot to add a new mailbox

• Safe to delete anytime

✔ Ideal when replacing old users
✔ Useful for rotating mailboxes
✔ Perfect for freeing up mailbox slots

🔴 Deleting Admin Mailboxes (Critical Warning)

Each domain has one admin mailbox responsible for:

• Domain configuration

• DNS authentication

• Mailbox provisioning

• Forwarding and routing

If you delete the admin mailbox, then:

⚠ The entire domain setup is permanently deleted

This includes:

• All mailboxes under the domain

• DNS configurations

• Routing settings

• Warmup data

• Sequencer connections

This action cannot be undone.

Only delete an admin mailbox if you want to completely remove the entire domain from InboxKit.

⚠ Important Notes

• Deleting a mailbox does not instantly free up a slot — it frees up after cancellation is processed, but InboxKit automatically marks the slot available after deletion for subscription-based plans.

• Admin mailbox deletion = full domain deletion and loss of all associated mailboxes

• Scheduled cancellation helps avoid wasting credits or paid time

• You cannot restore a mailbox once the domain or mailbox is permanently deleted