Cold email sending calculator, volume you can trust.
Move the sliders to your setup: inboxes, emails per inbox, warmup and sending days. You get the safe daily and monthly volume, the week-by-week ramp from the day the inboxes go live, and how many replies to expect.
Each on a domain you own, never your main company domain.
30 to 50 a day is the range our inbox rotation guide gives for a fully warmed inbox. Start at 30.
FoxReach ramps each new inbox over 14 days, so two weeks is the shortest sensible gap. A brand new domain is better at three to four.
Weekdays only is five. Fewer days keeps replies at a pace your team can answer.
Our published campaigns replied at 0.32% to 0.63% of emails sent. A tight list and a specific opener do better.
Free, no signup. Everything is calculated in your browser.
150 emails a day at full volume, from week 3
At 30 a day or less per inbox you are at the careful end of the range.
| Week | Stage | Per inbox a day | All inboxes a day | That week |
|---|---|---|---|---|
| 1 | Warmup only | 0 | 0 | 0 |
| 2 | Warmup only | 0 | 0 | 0 |
| 3 | Full volume | 30 | 150 | 750 |
| 4 | Full volume | 30 | 150 | 750 |
| 5 | Full volume | 30 | 150 | 750 |
| 6 | Full volume | 30 | 150 | 750 |
The ramp caps each inbox at 10 a day in its first two weeks and 30 a day in weeks three and four, the top of the bands in our warmup guide. Planning for more? To send 1,000 a day at 30 per inbox you need about 40 inboxes, with 20% spare.
Let FoxReach hold the limits for you.
Set a daily limit per inbox and per campaign, warm every inbox before it sends, and rotate the campaign across all of them.
Volume is an inbox count problem.
Mail providers judge every sending inbox and domain on its own history. An inbox that sends 40 emails a day, every weekday, for months looks like a person. The same inbox sending 300 on its first Monday looks like a hijacked account or a bulk sender, and the filters treat it that way.
So the way to send more cold email is more inboxes at a modest daily limit each, not one inbox pushed harder. This calculator does the multiplication, and shows how long it takes a new inbox to reach that limit.
How the ramp is worked out.
- Warmup weeks. No campaign emails at all. The inbox only exchanges warmup mail, which FoxReach ramps up over 14 days.
- Weeks one and two of the inbox's life: at most 10 campaign emails a day per inbox.
- Weeks three and four: at most 30 a day.
- Week five on: your full daily limit, ideally 30 to 50.
The caps are the top of each band in our warmup guide, and the 30 to 50 range is the one in our inbox rotation guide. Treat them as ceilings: if bounces or spam placement rise, hold the inbox where it is.
What the numbers do not cover.
The calculator assumes the inboxes are authenticated, the list is verified and the copy is clean. A domain without SPF, DKIM and DMARC, or a list with a high bounce rate, will land in spam at any volume. Run the domain through the SPF, DKIM and DMARC checker and the email through the spam checker first.
More free tools.
SPF, DKIM & DMARC Checker
Enter a domain and see whether its MX, SPF, DKIM and DMARC records are ready for cold email, with the exact record to publish for anything missing.
Email Spam Checker
Paste a cold email and see the spam words, formatting and sentences that push it toward the spam folder, with a predicted inbox placement.
Email Subject Line Tester
Score a cold email subject line for length, spam words, tone and personalization, and preview how it looks in a phone and desktop inbox.
Email Signature Generator
Fill in your details, pick a style and copy a signature that pastes cleanly into Gmail, Outlook and Apple Mail, or copy the raw HTML.
Email Blacklist Checker
Check a domain or IP against five public email blocklists, with the addresses that were checked and the removal page for any listing.
Email Address Checker
Check one email address for the signs that it will bounce or waste a send: format, mail server, throwaway and role inboxes, and likely typos.
Questions,
answered.
For a fully warmed inbox, 30 to 50 a day is the range our inbox rotation guide gives, and 30 is a sensible start. A new inbox should send far less: about 10 a day in its first two weeks and up to 30 in weeks three and four.
Divide the emails you want to send per day by your per-inbox limit and add about 20% spare. At 30 a day per inbox, 1,000 emails a day needs about 40 inboxes. Spread them over several domains, and never send cold email from your main company domain.
FoxReach ramps each new inbox over 14 days before it reaches its warmup target, so two weeks is the shortest sensible gap before the first campaign. For a brand new domain our guides suggest three to four weeks, and the ramp should follow the inbox's results, not the calendar.
Plan low and be pleasantly surprised. The four campaigns in our published case study replied at 0.63% (construction) and 0.32% (IT) of emails sent. A tight list, a specific opener and a short email do better; our deliverability guide sets 5 to 15% as the aim for a well-targeted list.
Yes. A daily limit counts every email the inbox sends, first emails and follow-ups alike. A three-step sequence to 100 new leads is up to 300 emails over its run.
No. The calculator runs in your browser and sends nothing anywhere.
Plan the volume,
then send it.
FoxReach warms every inbox, holds each one to its daily limit and rotates the campaign across all of them, so the plan above is the one that runs.