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The warm-up of a new sending domain

Email services trust a domain that has sent good email for some time. A new domain has no history, so the app builds its volume up over 3 weeks.

The weeks start at the domain's first send. Emails over the limit wait in the queue and go when there is room, so a big campaign goes over a few days. The people who opened or clicked most recently get it first.

Do this in the first weeks

• Send to your most engaged people first: under the tags, choose Only people who opened or clicked in the last 90 days.
• Remove old addresses that never open, and addresses that bounced in your old service.
• Keep the same sending domain. A new domain starts the warm-up again.

Owners and admins can change the start size, from 50 to 2,000 a day, in Settings → Sending domains before the first send. Without a domain of your own, the shared domain's warm-up counts every business that sends from it.