> For the complete documentation index, see [llms.txt](https://docs.boomerangme.cards/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.boomerangme.cards/white-label/resend.md).
# Resend
> **Boomerangme > Left-Hand Menu > Settings > White Label**
1. Follow the workflow mentioned above to land on the White Label screen.
2. From the buttons displayed at the top-right corner, click Other Settings.
Other Settings
3. Navigate to the Resend tile and click the Connect Account button.
4. Doing so opens the Connecting a Resend account popup. Here, enter your Resend API key in the API Key field.
### Support for multiple Resend mailboxes:
It is now possible to connect both a primary mailbox for general mailings (e.g., registration details, password resets, etc.) and additional mailboxes used exclusively for mailings via Richie.
First, select the primary mailbox from the list of available mailboxes and enter the sender name. This mailbox will be used to send:
* welcome emails after your clients (sub-accounts) register
* password recovery emails
* manager registration emails
❗️ If you encounter an error where the address list is not visible after adding the API key and the Connect button remains inactive. , please check the following:
1. Go to **Domain Settings**
2. Click on **SMTP Credentials**
3. Click the **\[Add new SMTP user]** button
4. Add several SMTP users
Then, try connecting Boomerang again.
After selecting the primary mailbox, the user needs to enter the sender name and choose additional mailboxes for mailings via Richie. You can select as many mailboxes as you have configured in your Mailgun account.
After selecting the mailboxes, click "Connect". Connect and you're all set!
\
You're now ready to receive and manage emails seamlessly with Mailgun and Boomerangme
### Setting up an email sender at the agency level for sub-accounts
{% embed url="" %}
We’ve enabled centralized e-mail sending: the agency connects its own Mailgun at the agency level and selects a sender address. Sub-accounts can then send e-mails billed to the agency, without configuring their own Mailgun. Campaigns are available immediately after a sub-account is created.
Each sub-account has a monthly limit of 100,000 messages. Once the limit is reached, sending is paused until the next billing period (or until the limit is increased).
Sub-accounts can still connect their own Mailgun if needed — this option remains unchanged.
**The sender name is generated dynamically for each sub-account.**\
A sub-account–specific variable is automatically appended to the base name, so the displayed sender name is unique for each sub-account.
### Edit mailgun connection
At any time, you can edit the connection, select new mailboxes, or disconnect old ones. To do this, use the "Edit" button.