Setup guide

Set up MAILsimple with Claude

This guide walks you through everything from creating your account to connecting mailboxes and adding MAILsimple to Claude Desktop. Most people are up and running in a few minutes.

1. Create your account and choose a plan

Head to account.ccmssolutions.com and create your account. Choose the plan that fits:

• Free: one connected mailbox (Outlook or IMAP) at no cost.
• Pro: \$9/month or \$90/year (two months free) for unlimited mailboxes with full read, write, and send.

Once your plan is active, your account provides a connector license key: a value that starts with csk_. You will paste this key into Claude in a later step, so keep it handy. You can view or regenerate the key from your account at any time.

Create your account Sign in

2. Connect an Outlook / Office 365 mailbox

Sign in to the connector at mailsimple-mcp.ccmssolutions.com and choose to add an Outlook / Office 365 account.

1. Select Add mailbox, then Outlook / Office 365.
2. You are redirected to Microsoft's official sign-in to authorize access. MAILsimple never sees your Microsoft password.
3. Review the permissions Microsoft shows you and approve. You are returned to MAILsimple with the mailbox connected.

Repeat for as many Outlook / Office 365 accounts as your plan allows. On Free you can connect one mailbox; on Pro you can connect as many as you need.

3. Connect an IMAP/SMTP mailbox

MAILsimple works with any standard IMAP/SMTP mailbox: custom domains, hosting providers, and most email services.

1. At mailsimple-mcp.ccmssolutions.com, choose Add mailbox, then IMAP / SMTP.
2. Enter your incoming (IMAP) server host and port, and your outgoing (SMTP) server host and port. Your email provider publishes these settings.
3. Enter your username (usually your full email address) and password. If your provider uses two-factor authentication, create an app password and use that here.
4. Save. MAILsimple validates the connection and encrypts your credentials at rest.

If a connection fails, double-check the host, port, and whether your provider requires an app password rather than your normal login.

4. Add MAILsimple to Claude Desktop

With your mailboxes connected, add MAILsimple to Claude Desktop as a custom connector.

1. Open Claude Desktop and go to connector settings, then Add custom connector.
2. For the connector URL, enter https://mailsimple-mcp.ccmssolutions.com/mcp.
3. When prompted for your key, paste your connector license key (the csk_... value from your account).
4. Save. Claude can now search, read, organize, and (on Pro) send across your connected mailboxes.

You only need to add the connector once. New mailboxes you connect at mailsimple-mcp.ccmssolutions.com are available to Claude automatically.

5. Manage mailboxes and permissions

From the connector at mailsimple-mcp.ccmssolutions.com you control exactly what Claude can do with each account:

• Set per-account permissions for read, send, and delete.
• Add or remove mailboxes at any time.
• Disconnect a mailbox to revoke access immediately.
• Review the action audit trail to see what was done and when.

Permissions are enforced on every request, so a mailbox set to read-only can never be used to send or delete, even if asked.

6. Security and privacy

• Outlook / Office 365 is connected through Microsoft's official OAuth sign-in; MAILsimple never stores your Microsoft password.
• IMAP/SMTP credentials and OAuth tokens are encrypted at rest.
• Each account's read, send, and delete permissions are enforced on every request.
• Every action Claude takes is recorded in an audit log.
• We do not sell your data, and we do not use your mailbox contents to train models.

For more detail, see our Privacy Policy and Terms of Service.