In the world of email warmup tools, most traditional solutions restrict you to warming up just one mailbox per plan — forcing agencies, growing teams, or scaling outreach campaigns to purchase multiple separate subscriptions. This quickly becomes expensive and cumbersome to manage.
E-Warmup takes a different approach, designed for flexibility and real-world scaling.
E-Warmup offers tiered plans that already include multiple mailboxes out of the box:
Lite — 1 mailbox
Basic — 2 mailboxes
Growth — 3 mailboxes
Premium & High Volume — 5 mailboxes
Each plan comes with increasing daily warmup email volumes (from 50 to 1000 per mailbox) and higher overall sending capacity — perfect for ramping up your cold email or marketing campaigns safely and effectively.
But what if you need to warm up even more mailboxes? That's where the Mailbox Limit Increase Add-on comes in.
This powerful add-on lets you purchase additional warmup seats beyond your plan's built-in mailbox allowance. Whether you're an agency managing dozens of client accounts, a business running multiple domains, or simply scaling your outreach — you can add as many extra mailboxes as you need.
Key benefits include:
Flexible scaling — Add 1, 5, 10, or more mailboxes depending on your growth needs
Single dashboard management — Keep everything in one place instead of juggling multiple accounts/tools
Cost-effective — More affordable than buying separate full plans for each extra mailbox
Same premium warmup quality — Every added seat gets the full power of E-Warmup's AI-driven, personalized conversations, auto-reputation fixing, blacklist monitoring, and high inbox placement rates
With the Mailbox Limit Increase Add-on, you're not locked into rigid "one mailbox per tool" limitations. Instead, you get the freedom to grow your email infrastructure exactly how your business demands.
Head over to our pricing page to see the current plans and add the Mailbox Limit Increase Add-on during checkout (or contact our sales team for custom high-volume needs).
Start warming up your emails smarter — and scale faster — with E-Warmup today.
Your inbox placement (and ROI) will thank you! 
