3-day free trial · card on file, never charged
Reach the inbox while your competitors reach spam.
Mail Exchange tells you which addresses on your list are real and safe to send to, so dead addresses never touch the sender reputation your revenue depends on.
25 checks free for 3 days. Then packs from $29, and credits never expire.
- Catch-all and risky addresses flagged
- Thousands of addresses in minutes
- Unknown results refunded
- Deliverable3,640
- Risky548
- Undeliverable612
- Unknown20
From the team behind Media List, used by teams at
A bad list doesn't fail loudly. It quietly kills your pipeline.
A salesperson buys a list, or scrapes one, and starts emailing it. A sizable share of those addresses are dead, mistyped, abandoned or spam traps. The bounces come back, and mailbox providers watch every one of them.
Nothing breaks that day. The campaign “sends” and the dashboard looks busy. Then your next campaign lands in spam, and the one after that. You can't see the deal that didn't happen.
- The bounces arriveEvery dead address is a hard bounce on your sending domain.
- Reputation slipsMailbox providers score your domain and IP on bounces, complaints and traps.
- Mail goes to spamNo rejection notice. Your emails just stop being read.
- Revenue goes quietReplies dry up and nobody can point to the day it started.
Reputation belongs to everyone who sends as you.
Email reputation is attached to the sender: your domain and the IP addresses behind it. When one bad list drags it down, every message pays for it.
Prospect follow-ups
The people who were already interested stop seeing your replies.
Quotes and renewals
Invoices and renewal reminders to existing customers land in spam.
Support and founders
Every reply from your team carries the same damaged reputation.
Every colleague
Including the ones who did nothing wrong. Repair takes weeks, prevention takes minutes.
One DNS lookup decides if your mail is even accepted.
A DNS black hole list (DNSBL) is a public database of sending IPs and domains known for abuse or poor list hygiene. The receiving server asks it about your address in real time and, if you're listed, refuses your message or files it under spam, often without telling you.
What gets a sender listed is exactly what a bad list produces: mail to addresses that don't exist, spam trap hits and complaints. Verification removes them before you send.
# 1. the receiving server sees your sending IP: 192.0.2.10
# it reverses it and asks a blocklist:
dig 10.2.0.192.zen.spamhaus.org
# 2. an answer in 127.x.x.x means "listed"
127.0.0.2 → refuse the mail, or send it to spam
# 3. no answer (NXDOMAIN) means "not listed"
NXDOMAIN → accept it and keep scoring
# what gets an IP listed:
bounces mail to addresses that don't exist
traps mail to addresses set up to catch senders
spam complaints from the people you reached
# what a verified list does:
bounces → 0 traps → 0 listed → noWhile their emails go to spam, yours get read.
Same buyer, same pitch, a different outcome. Your message gets read first, and you get the reply, the meeting and the deal.
A quiet decline
Bounces rise, the domain's reputation slips, campaigns land in spam and existing customers' emails start to miss the inbox too.
Reputation as an asset
Dead addresses and traps are removed before you send. Bounces stay low, your domain stays trusted, and you win the inbox your competitors lose.
From a messy list to a list you can trust, in minutes.
No software to install, and nothing is ever sent to your contacts.
Add your emails
Paste an address, upload a CSV, or connect through our API or MCP server.
Get your clean list
Every row comes back marked deliverable, risky, undeliverable or unknown, with your other columns kept.
Send with confidence
Import the good ones into your sending tool. Bounces drop and your domain stays healthy.
Automate it with our API·Connect it to Claude, ChatGPT or Cursor
Clean a whole list in minutes.
Upload a CSV or paste your addresses. We sort every one into deliverable, risky, undeliverable or unknown, and tell you why.
- Cut bounces by removing dead mailboxes and domains
- Spot catch-all servers that accept anything and bounce later
- Duplicates removed and never charged
Verify at the point of capture.
One HTTP call returns the state, the reason and the details you need to decide. Drop it into a signup flow, a CRM sync or your own sending tool.
- Simple JSON: state, reason, score, MX, role, free, disposable
- Lists up to 100,000 with signed callbacks
- Same engine as the dashboard, so results always match
Verify leads before they hit Instantly or Smartlead.
Outreach platforms pause campaigns and burn domains when bounces climb. Clean every lead list before you import it, and keep your sending domains healthy.
- Catch-all detection for the risky leads exports are full of
- Export straight back to CSV with a state on every row
- Unknowns refunded, credits that never expire
Step-by-step workflows for:
See all integrations →
The same protection for a fraction of the price.
Pay-as-you-go packs, one-time, no subscription. Credits never expire and unknowns are refunded.
| Emails verified | Mail Exchange | Emailable | NeverBounce | Kickbox | ZeroBounce |
|---|---|---|---|---|---|
| 5,000 | $29 | $38 | $40 | $40 | $69 |
| 10,000 | $49 | $60 | $50 | $70 | $129 |
| 100,000 | $299 | $420 | $400 | $500 | $649 |
| 1,000,000 | $1,699 | $2,100 | $2,500 | $2,999 | $3,199 |
Pay-as-you-go pack prices from each vendor's pricing page, checked 2026-10-17.
Questions we hear before the trial.
Do you send emails to the addresses I check?
No. The mailbox check ends before any message is sent. Mail Exchange never emails the people on your list.
What happens after the 3-day trial?
You can verify up to 25 addresses in the 3 days after you sign up. The card is never charged for the trial. Afterwards you choose whether to buy credits, from $29 for 5,000, or walk away.
Why do you ask for a card on the trial?
Every check costs real compute, and open free offers attract repeated signups. The card keeps the trial for people who are evaluating us. It is saved, not charged.
Do credits expire?
No. Credits never expire, and unknown results and duplicates are refunded.
Is there an API?
Yes. A REST API verifies single addresses or lists of up to 100,000, with signed callbacks. API keys are issued on request.
Your next send is the one that counts.
Find out how many of your addresses are already dead. Start with 25 free checks, no commitment, and see exactly what we'd remove.
Start your free trial →
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