Email warm up schedule generator
A new sending domain has no reputation. This builds the 28 day ramp we enforce in our own send path, adjusted for your list size and whatever daily ceiling your relay imposes.
Your 28 days
| Day | Phase | Send up to | To whom | Gate before you increase |
|---|---|---|---|---|
| Loading. | ||||
What the numbers are
The ramp comes from Resend's documented domain warm-up curve, which we encoded into our own send path: roughly 150 on day one, multiplied by about 1.4 each day through day seven, then 10 to 20 percent per day through day 28, then held. Our code stops there and hands over to the relay's own ceiling.
The gates are not advice. In our send path they are enforced: a complaint rate at or above 0.3 percent or a bounce rate above 2 percent pauses sending automatically, measured on a rolling 30 day window. The 0.1 percent line in the table is the target you should hold yourself to, well before the 0.3 percent line where Gmail withholds delivery mitigation until you are back under it for seven consecutive days.
The honest caveat
Most senders never touch these volumes, and the ramp stops mattering long before you reach the bottom of the table. If your relay caps you at 95 a day, as ours does, then the cap is your schedule and the only real lever is consistency: send on a regular cadence to people who asked, and never leave a gap that makes you look like a dormant domain that suddenly woke up.
A ramp also cannot rescue a bad list. Volume discipline protects a domain that is sending wanted mail. It does nothing for a purchased list, where the complaints arrive faster than any schedule can absorb them. If you are ramping because you bought addresses, the schedule is not your problem.
Where this fits
Warming a domain is one part of a longer setup. The DNS records have to pass before the first send, which is what the DNS worksheet is for, and every campaign after that should clear the pre-send checklist. The reasoning behind the whole approach, including why we refuse to send fake mail to ourselves to speed this up, is in the warm-up log.