Glossary
Glossary1 min read
Email Warm-up
Email warm-up is gradually ramping a new domain's sending volume to build reputation. A definition, with the full guide linked.
RT
RepMail Team
Product & Engineering · July 17, 2026 · 1 min read
Email warm-up is the practice of raising a new sending domain's volume gradually over two to four weeks, rather than sending at full volume immediately. A cold domain that suddenly sends thousands of messages looks like a compromised account.
Let your bounce and complaint rates set the pace as you ramp.
See the full guide: Full guide: why new domains need warm-up.
Resources in this guide
A typical ramp
Reference| Week | Rough volume |
|---|---|
| Week 1 | 20-50/day |
| Week 2-3 | raise gradually |
| Week 4+ | full volume |
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deliverability
sender-reputation
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Frequently asked questions
How long does email warm-up take?
Typically two to four weeks, starting at roughly 20 to 50 messages a day and increasing gradually while watching bounce and complaint rates.
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