Mail Tester alternatives
You're here because one message test covers only half of a send. ZapBounce puts the message test and the list check on one site. Send your email to a test address for a score out of 10, then upload the list and get a verdict on every row before the campaign goes out.
| Service | 100,000 addresses | Credits expire? | Bills unknowns? |
|---|---|---|---|
| ZapBounce | $139 | Never | No |
| ZeroBounce | Subscription only | Credits roll over while the subscription is active | Not stated |
| Bouncer | $400, and 1,000,000 for $2,000 | Never | No |
| Emailable | Custom | Never | No |
| Clearout | Not listed | Never | No |
| Kickbox | $500 ($1,100 for 250,000; $2,999 for a million) | Credits expire one year from purchase | No |
| Mail Tester | See their pricing page | See their pricing page | Not stated |
Read from each vendor's own pricing page in September 2026. Prices move, so confirm theirs before you buy. Ours are published in full on the pricing page.
Why people look elsewhere
Most people who search for a Mail Tester alternative have a good score and a campaign that still bounced. A message test grades one email sent to one address. The list you're about to mail is a separate question, and bounces from dead mailboxes hurt your sender reputation however well the message scored.
Mail Tester sells test packs as one-time purchases and as monthly subscriptions sized by tests per month, and a manual web test needs no account (mail-tester.com/manager, read September 2026). On ZapBounce the deliverability test is a free tool on the site, and list checks are priced per address with no plan required: $25 for 10,000.
What ZapBounce changes for a Mail Tester user
The differences that show up on the first invoice and the first results file.
The short version
- The ZapBounce deliverability test gives you a one-off address, reads SPF, DKIM, DMARC, reverse DNS, blocklists and content, and scores the message out of 10.
- Every point you lose comes with the fix, so the report works as a to-do list for your next send.
- The same site cleans the list: upload a CSV, TXT or XLSX file and each row comes back valid, invalid, catch_all or unknown.
- List checks cost $5 for 1,000 and $139 for 100,000, and unknown results and duplicate rows are never billed.
- Credits never expire, and 100 free credits arrive every month with no card.
Before you move off Mail Tester
Run the same sample through two vendors and the interesting number is not how many came back valid.
Send one campaign email to both test addresses
Send your real campaign email to Mail Tester and to the ZapBounce test address from the same tool. Compare which findings each report lists, and whether each one comes with a fix.
Trace a failed SPF line back to DNS
A lost SPF or DMARC point usually starts in your DNS records. Look up your SPF record first, before you change any setting in your sending platform.
Look up your sending IP on the blocklists
One listing can pull a whole campaign into spam. Check the IP your platform sends from, and run it again after each fix.
Price the list you'll mail next
Count the addresses in your next send. At $5 for 1,000 and $139 for 100,000, with unknowns and duplicates never billed, you know the cost before you upload.
What switching actually involves
There's nothing to export. Open the ZapBounce deliverability test and send your usual campaign email to the one-off address, from the tool that really sends it. Then upload the list you plan to mail as a CSV, TXT or XLSX file. Your own columns come back with the result, the reason and a billed flag on every row.
What stays true whichever verifier replaces Mail Tester
Questions about moving off Mail Tester
Is there a free alternative to Mail Tester?
Yes. ZapBounce's email deliverability test is free: you send one email to a one-off address and get SPF, DKIM, DMARC, blocklist and content findings with a score out of 10. The page waits five minutes for your message to arrive.
Does a 10 out of 10 score mean my list is clean?
The score grades the message and the server that sent it, so each address on the list still needs its own check. ZapBounce returns valid, invalid, catch_all or unknown for every row, at $5 per 1,000 addresses.
Should I test the message or clean the list first?
Clean the list first, then test the message. A clean list keeps bounces off your reputation, and the message test shows whether authentication and content hold up. Both run on the ZapBounce site, and list checks can use the 100 free credits you get each month.
Why do people leave Mail Tester?
Most people who search for a Mail Tester alternative have a good score and a campaign that still bounced. A message test grades one email sent to one address. The list you're about to mail is a separate question, and bounces from dead mailboxes hurt your sender reputation however well the message scored.
How hard is it to switch verifiers?
For bulk cleaning, no harder than uploading the file somewhere else. For real-time checks on a signup form it is an API swap, which is an afternoon.
Test one real campaign email on ZapBounce, then run the list behind it. A score out of 10 and a verdict on every row is the whole pre-send check.
Put us next to Mail Tester on your own list
100 free checks a month, no card.