Email Freshness Checker
Estimate how much of an email list is still deliverable based on its age and the standard ~2%/month decay rate. Free list-freshness calculator.
Check your list freshness
Estimate how much of a list is still deliverable based on its age and the standard decay rate.
What this freshness checker does
Common use cases
- 1Deciding when to re-verify a list
- 2Estimating decay on an old list
- 3Planning list-hygiene schedules
- 4Justifying re-verification to a client
- 5Forecasting deliverable reach
- 6Assessing a purchased or dormant list
Related tools
About email list freshness
Email lists decay: people change jobs, abandon inboxes and switch providers, so a typical list loses roughly 2–2.5% of its addresses every month even if you do nothing wrong. After a year, a fifth or more of an unmaintained list can be undeliverable.
This checker applies that decay rate to your list's age to estimate how much is likely still valid — a fast way to decide whether re-verification is due. Because it is a statistical model rather than a per-address test, use it for planning and confirm the real figure by running the list through the Bulk Email Verifier.
More Free Tools Where This Came From
This utility is one of dozens of free, no-login tools for DNS, email, SEO and developers — all instant and private.
HostCloud.in · Pune, India · Serving 34,987+ Websites Since 2020
Got Questions? We Have Answers.
How does the freshness estimate work?
It applies a monthly decay rate (default ~2.1%) to your list's age to estimate the share of addresses likely still deliverable.
Why do email lists decay?
People change jobs, abandon inboxes and switch providers, so a typical list loses roughly 2–2.5% of its addresses every month even with no mistakes.
Is this a per-address check?
No. It is a statistical estimate for planning. Confirm the real figure by running the list through the Bulk Email Verifier.
When should I re-verify a list?
When the estimated valid share drops below about 90%, or before any major send to an older list.