Test a mailbox integration
Check a connected mailbox can still sign in with Test connection, then send yourself a real message with Send test email before you start a campaign.
Last updated Integrations
On this page
Before a campaign goes out, check that the mailbox works. The integration's Test tab has two checks.
Before you start
- You need the Moderator role or higher.
- The integration needs at least one sender. See Senders and the default sender.
Test connection
- Open Integrations and click Manage on the integration.
- Go to the Test tab.
- Under Connection check, click Test connection.
Signalsant checks that your default sender can still sign in. For SMTP it logs in to your server; for Gmail and Outlook it checks that access is still granted. No email is sent.
You'll see "Connection verified", or the provider's error ("Connection failed" if it gives none).
Send a test email
- On the same tab, find Send a test email.
- Check From, which starts as the default sender, and the Sender name.
- Enter an address you can open in Send to.
- Optionally change Subject (optional) and Message (optional). If you leave them empty, the subject is "Test email from" followed by the integration's name, and there's a short confirmation message.
- Click Send test email.
This sends a real email through the integration. You'll see "Test email sent to" followed by the address you entered. Check that inbox, and its spam folder.
You can also open this tab from the ⋯ menu on the integration's card: choose Send test email.
Troubleshooting
- "Add a sender first — the check runs as your default sender.": add a sender on the Senders tab.
- "Failed to test connection" / "Failed to send test email": check that the integration is switched on. A switched-off integration can't send.
- "Connection failed" on SMTP: check Details → SMTP settings. See Connect any mailbox with SMTP.
- "Access was revoked": reconnect the mailbox. See Reconnect a mailbox.
- The test email lands in spam: see Improve deliverability.
Related articles
- Senders and the default senderSenders are the From addresses on a mailbox integration. Add or remove them, choose the default, and pick which one each email campaign sends from.
- Reconnect a mailbox after access is revokedWhen Google or Microsoft revokes access, the mailbox shows Access revoked and its campaigns pause. Reconnect with the same mailbox to resume sending.
- Emails aren't sendingA checklist for campaigns that aren't sending: campaign status, mailbox access, sending hours, the daily plan, failed messages and companies without email.
Still stuck?
Write to us and a person from the team will help you sort it out.

