Email Warmup Calculator

Calculate an optimal email warmup schedule for new domains or IPs. Get a day-by-day sending plan to build sender reputation without triggering spam filters.

Plan your email warmup schedule for new domains or IPs

Target Daily Volume

Emails per day after warmup

Warmup Pace

30% daily increase - balanced approach

Days to target

Starting volume

51,717

Total during warmup

Warmup Schedule

Day	Daily Emails	Cumulative
Day 1	50	50
Day 2	65	115
Day 3	85	200
Day 4	110	310
Day 5	143	453
Day 6	186	639
Day 7	241	880
Day 8	314	1,194
Day 9	408	1,602
Day 10	530	2,132
Day 11	689	2,821
Day 12	896	3,717
Day 13 Target reached	1,000	4,717
Day 14	1,000	5,717
Day 15	1,000	6,717
Day 16	1,000	7,717
Day 17	1,000	8,717
Day 18	1,000	9,717
Day 19	1,000	10,717
Day 20	1,000	11,717
Day 21	1,000	12,717
Day 22	1,000	13,717
Day 23	1,000	14,717
Day 24	1,000	15,717
Day 25	1,000	16,717
Day 26	1,000	17,717
Day 27	1,000	18,717
Day 28	1,000	19,717
Day 29	1,000	20,717
Day 30	1,000	21,717

Showing first 30 days. Download CSV for full schedule.

Warmup Best Practices

• Send to engaged subscribers first (recent openers)
• Monitor bounce rates daily - pause if > 2%
• Check spam folder placement with seed lists
• Avoid cold outreach during warmup period
• Maintain consistent sending times each day

Why warmup?

New IPs/domains have no sending reputation
ISPs flag sudden high volume as spam behavior
Gradual increase builds trust with email providers
Rushing warmup can permanently damage deliverability

About this tool

This free utility is designed to help email marketers and developers improve their deliverability and campaign performance. At Sequenzy, we believe in providing transparent, helpful tools for the community.

Frequently Asked Questions

Email warmup is the process of gradually increasing sending volume from a new domain or IP address. This builds sender reputation with ISPs and prevents your emails from being flagged as spam.

Typically 4-8 weeks depending on your target volume. Start with 20-50 emails per day and gradually increase. Rushing this process will damage your sender reputation.

Send to your most engaged subscribers first - those who regularly open and click. Their positive engagement signals to ISPs that your emails are wanted. Avoid cold outreach during warmup.

Monitor your inbox placement rate, open rates, and bounce rates. Good signs: >95% delivery rate, consistent open rates, minimal spam complaints. Bad signs: increasing bounces or spam folder placement.

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