Home C5 - Deliverability 5.1 Connecting a mailbox

5.1 Connecting a mailbox

Last updated on Nov 13, 2026

Where

14 settings mailbox

Go to Settings → Mailbox and add a mailbox.

Supported providers

  • Google (Gmail / Google Workspace) — OAuth sign-in.
  • Microsoft Exchange
  • Microsoft 365
  • Yahoo
  • AOL
  • GMX
  • Namecheap
  • IMAP — generic connection for other providers; you'll supply server details and credentials.

After connecting

Each mailbox has its own settings screen:

  • Name — label shown across the app.
  • CRM email to bcc — BCC address for CRM activity logging.
  • Daily Sending Limit — hard cap on sends per day from this mailbox.
  • Signature — plus include toggle.
  • Opt-out statement — plus include toggle; clicking the link marks the prospect opted_out.

First sends

Send a test email to yourself. Check the From name, signature, and opt-out footer render correctly before any campaign uses the mailbox. Then ramp volume gradually — see Daily sending limits.