Warm-up between your mailboxes
Start volume, daily increase, maximum and reply rate per mailbox, on weekdays with lighter weekends.
Mailboxes & warm-up
Keep your mailboxes out of spam while you scale.
Connect sending mailboxes and let them warm up by emailing each other on a gradual ramp. Optimizly checks where warm-up mail lands, rescues it from spam, replies to part of it, and scores each mailbox's health.
What you can do
What you can do with Mailboxes & warm-up.
Inbox placement
With IMAP access, each warm-up mail is found in the inbox or spam; spam is moved back and flagged.
DNS checks
SPF, DKIM, DMARC, MX and tracking-domain checks with fix-it help.
Health score and limits
A 0–100 score from placement, bounces and DNS, plus a recommended daily limit while warming.
How it works
How it works, step by step.
Connect two or more mailboxes
Add sending servers and IMAP access.
Fix DNS
Follow the checklist for SPF, DKIM and DMARC.
Switch warm-up on
Let it ramp for about three weeks before sending at volume.
FAQ
Mailboxes & warm-up questions
Why do I need two mailboxes?
Warm-up mail goes between your own mailboxes, so there must be at least two.
Do warm-up emails count toward my limits?
No. They are separate from campaigns and sequences.
See Mailboxes & warm-up with your own data.
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