Why new sending domains need to warm up

When you start sending marketing email from a domain that has never sent bulk email before, mailbox providers (Gmail, Yahoo, Outlook) have no reputation history for it. Until they build that history, they play it safe — routing your mail to the Promotions tab or occasionally to Spam.

This is normal, universal, and not specific to MailMonk. Every email platform — Mailchimp, Klaviyo, ConvertKit, anyone — sees the same behaviour on a cold domain.

What to expect in the first 2–4 weeks

• Early sends may land in Promotions or Spam even though everything is configured correctly.
• As real recipients open, click, and reply, providers gradually learn your domain sends wanted mail — and placement improves.
• There is no button that skips this. Reputation is earned through genuine engagement over time, not bought or faked.

How to warm up the right way

1. Start small and engaged. Send your first campaigns to a small segment of your most engaged, recently-active contacts — people who actually open and reply. Strong early engagement is the single biggest signal.
2. Ramp volume gradually. Increase your daily volume over the first one to two weeks rather than blasting your whole list on day one.
3. Keep your list clean. Remove invalid and unengaged addresses so you’re not generating bounces or complaints. See List hygiene, consent & bounces.
4. Send mail people want. Relevant content to people who opted in is what builds reputation. See Content best practices.

Promotions is not failure

Landing in Gmail’s Promotions tab is the correct destination for opt-in marketing email — it is success, not failure. See My emails went to Promotions/Spam.

A note on “warmup tiers”

MailMonk applies a daily sending cap that protects sending infrastructure from abuse. That cap is a send-rate guardrail, not domain warmup — it limits how much you send per day, but the actual reputation-building still comes from real engagement on your domain as described above.

What about a dedicated IP or a “warmup tool”?

• Dedicated IP: Not recommended at this stage. A cold dedicated IP delivers worse than the shared, already-reputable IPs MailMonk uses. Dedicated IPs only pay off above roughly 100,000 emails/month.
• Warmup tools (seed-inbox networks that auto-open and auto-reply to fake engagement): MailMonk deliberately does not use these. They’re increasingly detected and discounted by Google, and ineffective on shared IPs. The legitimate path is the gradual real-list ramp above.