Starting fresh? We'll get your IP into the inbox before you start sending.
MailMonitor’s email warmup service builds sender reputation from day one. Whether you’re warming a brand-new IP, a fresh domain, or recovering from a blacklisting, our deliverability experts guide your ramp-up so your first real campaign lands in the inbox, not the spam folder.
16 years warming IPs for brands like TikTok, HSBC, and 16,000 others
Real strategy, not bot networks. ISP-safe warmup that won't backfire.
Hands-on deliverability expert guiding every phase of your ramp-up
Get a free warmup assessment
Tell us a bit about your situation. A deliverability expert will review it and reach out within one business day with a concrete warmup plan.
No commitment. Free assessment. We'll share a warmup roadmap whether you work with us or not.
What is IP warmup, and why does it matter so much?
If you’ve sent emails before, you’ve probably heard the term thrown around. Here’s the short version of what email warmup actually is, why ISPs care, and what happens if you skip it.
- 01
What email warmup actually is
Email warmup (also called email warm up services or an IP warm up service) is the process of gradually increasing your sending volume from a new IP or domain so mailbox providers learn to trust you. Start low, send to your most engaged contacts first, and grow over weeks, not days.
- 02
Why ISPs care so much
A brand-new IP has zero sending history. Gmail, Outlook, and Yahoo don't know if you're legitimate or a spammer. They use sending patterns, engagement signals, and authentication to decide. Warmup is how you build that history responsibly.
- 03
What happens if you skip it
Sending high volumes from a cold IP looks like spammer behaviour to ISPs. You get throttled, blocklisted, or routed straight to spam. Worse, that reputation damage can take months to undo. Skipping warmup almost always costs more than doing it right.
Most email warmup tools are just automated bot networks. Here's what makes MailMonitor different.
Automated warmup tools use bot accounts to email each other back and forth, inflating engagement metrics that look good but mean nothing to real ISPs. We don’t do any of that. Here’s the honest comparison.
Automated warmup tools
MailMonitor's email warmup service
What an 8-week MailMonitor warmup actually looks like
A realistic warmup takes time. Here’s a typical 4-phase engagement, though your exact timeline depends on your sending volume and audience.
- Weeks 1-2
Foundation
We audit your DNS, set up SPF/DKIM/DMARC, clean your list, and align your authentication. No real sending yet, just setup.
- Weeks 3-4
Initial sends
Low-volume sends to your most engaged contacts only. We monitor inbox placement across all major ISPs every day.
- Weeks 5-6
Ramp-up
We gradually increase volume, expanding to less-engaged segments while watching your reputation score and adjusting if needed.
- Weeks 7-8
Scale
Full sending capacity reached with a healthy sender reputation. You're ready to scale confidently and we hand back the keys.
Hear straight from our customers
MailMonitor helps us identify and fix our spam issues. It's like having a deliverability expert on our team. The weekly check-in calls allow us to take feedback, implement it and then follow up the next week with additional items to clarify or get help with. This cadence helps our team get better email results.
Dan Westenskow
CEO, Fusion HCS
MailMonitor's software is easy enough to understand for a beginner with little knowledge of email placement. But what sets them apart is their hands-on support to maximize our deliverability. The team is always friendly and responsive, even with challenging clients like us!
Nathan Merryfield
Director of Marketing, hubXchange
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