How to Spend a Fixed Number of Email Checks Across Several Lists
With a fixed number of checks and more addresses than you can cover, verify the list you will send first and the list most likely to bounce, and sample the rest. The biggest list is not the one to start with. The riskiest one is.
Step 1: free passes first
Before you spend a check, shrink every list with free tools: remove duplicates, fix typo domains and flag disposable addresses. Shrink an email list for free before you verify it has the full order.
Step 2: rank the lists by risk and by date
| List | Risk | Send date |
|---|---|---|
| Customers from last month | Low | Any time |
| Webinar or event sign-ups | Medium: typos | Soon |
| Scraped or bought list | High | Whenever you are ready |
| Old CRM export | High: decay | Often "someday" |
Verify first what you will send first, and among lists with the same send date, the highest risk.
Step 3: sample the rest
Use the free email list sampler to draw 100 random addresses from each unverified list, and verify them. The first 100 checks are free with a Google sign-in, no card. The valid share of each sample tells you which list is the dirtiest. A 100-row sample is rough, roughly plus or minus 10 points at worst, so use it to rank lists that differ a lot, not lists that are close.
Step 4: spend the rest on the worst
Put the remaining checks on the list with the worst sample. Sending to an unverified list that bounces costs more than leaving a clean one unverified for a while.
Step 5: send the unverified lists carefully
For a list you could not verify, send a small batch first and watch the bounce rate. Calculate your email bounce rate shows how.
Packs, allowances and plans
- One-time packs never expire and run at standard speed, so they can be rationed across months. Packs start at $15 for 10,000 checks.
- Starter is $9 a month for 2,500 emails. The allowance resets each billing month and unused emails do not roll over, so spend it each month.
- Pro is $39 a month: the first 100,000 checks a month at full speed, then slower, never cut off.
If you find yourself rationing every month, a plan is the cheaper way to stop; see Starter or Pro and credits vs a monthly plan.
Next step
Run 100 free checks on a sample from each list, then see pricing for packs, Starter and Pro.
Common questions
Which list should I verify first when I cannot afford them all?
The one you will send next, then the one you expect to be dirtiest: scraped or bought lists before lists of people who bought from you last month.
How do I find out which list is worst without verifying all of it?
Verify a random sample of 100 from each. The first 100 checks are free with a Google sign-in, and a pack check after that. The list with the lowest valid share is the one to verify first.
Do SimpleVerifier packs expire?
No. One-time packs never expire. They run at standard speed. Starter's allowance resets every billing month and unused emails do not roll over.
Is it safe to send to an unverified list?
It depends on the list. A list of customers who bought last month is far safer than a scraped file. If you must send to an unverified list, send a small batch and watch the bounce rate.
When should I move from a pack to a plan?
When you spend a pack every month or two. Pro is $39 a month with the first 100,000 checks a month at full speed, then slower, never cut off. Work it out with your own volume.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.