The sending ramp
New mailboxes don’t send at full volume right away. Each mailbox has a daily sending cap that increases over its first 21 days, then holds at a maximum. This is the ramp: a server-enforced limit designed to build a new mailbox’s sending reputation gradually, rather than letting a brand-new address send a full volume of mail on day one.
The schedule
| Ramp day | Daily cap |
|---|---|
| 1–7 | 10/day |
| 8–14 | 20/day |
| 15–20 | 30/day |
| 21+ | 40/day (maximum) |
Ramp days are counted in UTC calendar days from the day the mailbox finished setting up, whether or not it sends anything. That day and the next both count as day 1, so 20/day starts 8 days after setup finished, 30/day 15 days after, and 40/day 21 days after.
Every new mailbox, on every domain, starts at day 1 of this same schedule. There’s no way to skip ahead.
Note
The warming label. Mailboxes show the state label warming while they can send. It means
the mailbox is on the ramp schedule, and the label stays the same after day 21. To see where a
mailbox is, check its “Ramp day N of 21” line and the cap on its meter. warming is not a
separate warmup service.
How caps are enforced
Caps are enforced on Truelist’s mail server, at the moment each recipient is submitted — regardless of what your sequencer is configured to send. Sequencers aren’t trusted to self-limit, so even if your sequencer’s own daily-limit setting is higher than the mailbox’s cap, sends beyond the cap are refused.
When a mailbox hits its cap for the day, further sends get a temporary error: “daily cap reached, resumes tomorrow.” This isn’t a bounce or a block on your domain — it clears automatically at midnight UTC, and sending can resume normally.
Warning
Set your sequencer’s limit at or below the mailbox’s cap. Otherwise your sequencer will keep retrying sends that get refused until the next day, which is wasted effort on its side. See Connecting your sequencer.
Reading the cap meter
Each mailbox on the domains pages shows a line like “14 of 20 RCPT evaluations today” with a progress bar. This counts each recipient Truelist accepts from your sequencer, counted once, at the moment it’s submitted — deferred and rejected recipients, including suppressed addresses, don’t count. It isn’t a count of mail that was actually delivered.
This number is an upper bound, not an exact sent/delivered count. It can read higher than the number of messages that actually went out, because a message can be accepted at this stage and then dropped later, or a brief server hiccup can cause the same attempt to be counted again. Never read this number as “delivered” — nothing in the product confirms delivery of any message.
When a mailbox’s count reaches its cap for the day, the UI marks it “cap reached”, and the mailbox also shows “Ramp day N of 21” so you can see where it is in the schedule.
Throttling
A throttle lowers the cap to a fixed number. It stays in place, even as the ramp moves forward, until support clears it. Nothing ever raises a cap above the ramp schedule. A throttled mailbox shows “Throttled” instead of its ramp day.
Total daily capacity
Once every mailbox on your account has fully ramped (day 21+, capped at 40/day each), your plan’s total daily sending capacity is:
| Plan | Domains | Mailboxes per domain | Capacity once fully ramped |
|---|---|---|---|
| Foundation | 3 | 3 | 3 × 3 × 40 = 360/day |
| Dedicated | 6 | 6 | 6 × 6 × 40 = 1,440/day |
Treat these as ceilings, not targets. They only apply once every mailbox has completed its 21-day ramp — a new mailbox, or a newly added domain, starts back at the 10/day cap and works up from there, so your actual daily capacity on any given day depends on how many of your mailboxes have finished ramping.