Doc recommends 3–5 per domain for rotation.

How long is the warmup?

14-day ramp with daily send caps per mailbox in the CSV.

How many mailboxes per domain?

3–5 recommended for rotation — calculator notes in download.

Conservative ramp option?

Halve daily volume column for high-risk TLDs or new domains.

Smartlead compatible?

Same schedule logic applies — adjust campaign settings per platform UI.

Instantly Domain Warmup Schedule CSV

Need this workflow live in your stack?

Templates are starting points. One senior operator imports, connects CRM, and maintains — flat fee, no black box.

Book Free Growth Audit

What does this Instantly template do?

CSV schedule for 14-day warmup: daily send caps per mailbox, target reply rate, and Instantly campaign settings. Prevents new domains from burning on day 3 with 200 sends.

What's included

14-day ramp CSV
Mailbox count calculator notes
Warmup copy suggestions

Common use cases

New outbound domain — Standard ramp before cold campaigns.
Agency client onboarding — Duplicate per domain in Instantly workspace.

How to import into Instantly

1
Download the file
Submit the form to receive your template link by email.
2
Open in your tool
Import or paste the file into Instantly following the template-specific notes below.
3
Customize copy and fields
Replace placeholder brand names, URLs, and merge tags with your values.
4
Test before launch
Send a test or run a dry-run import to confirm formatting and triggers.