patch
https://app.mailivery.io/api/v1/campaigns//update-email-per-day
Change the daily warm-up volume for a single mailbox (campaign). The new limit is applied immediately and is capped by your account's per-mailbox allowance. If the campaign is currently in ramp-up, Mailivery recalculates the scheduled volume for the remaining days to converge on the new target.
Not sure what value to use? See Recommended Warm-Up Settings — match your intended cold-send volume (up to 50 emails/day), set response rate to your plan's maximum, and turn ramp-up on.