post
https://app.mailivery.io/api/v1/campaigns/smtp
Create a new warm-up mailbox (campaign) using direct SMTP/IMAP credentials — the right choice for self-hosted mail servers and any provider that doesn't offer OAuth. Send the request as multipart/form-data with the mailbox owner's identity, SMTP outbound settings, IMAP inbox settings, sending volume, and optional ramp-up configuration.
On success
A 200 response confirms the campaign was created. The response payload includes the new id (save it for all subsequent warm-up operations), plus the campaign's name, email, status, timezone, daily volume, response rate, owner details, dashboard URL, and creation/update timestamps.