See deliverabilityproblems beforethey cost you.
Blacklist checks, SPF, DKIM, DMARC and MX checks, and a reputation label for every sending domain, so you fix a problem before it reaches your campaigns.
Healthy, Watch or At risk, with the reason.
Each domain gets one label built from real evidence: inbox placement, authentication, bounces and blacklists. The worst signal decides, and every problem is listed.
Records and blacklists, checked for you.
SPF, DKIM, DMARC and MX are checked every night and blacklists every six hours. Run either check on the spot from any mailbox.
Protection in every campaign.
Bounce Guard
Skips addresses known to bounce for any mailzy customer.
Automatic pause
A campaign stops itself if more than 5% of 200 or more emails bounce.
Provider matching
Mail between the same providers lands better.
Mailbox health
A mailbox that starts to slip sends at half speed, or rests, until it recovers.
Skips security gateways
Leads behind a company security gateway are left out unless you allow them.
Opt-out alarm
If 2% of a campaign's last 200 emails ask to stop it slows down, and at 4% it pauses.
One-click unsubscribe
The header Gmail, Yahoo and Outlook ask senders to use.
Custom tracking domain
Track clicks on a domain of your own, never a shared one.
Warm-up included
Every mailbox keeps building its reputation.
Questions before you start.
Ask us on the chat if yours isn't here. A real person answers.
Which blacklists do you check?
Five well-known lists, every six hours. A list that doesn't answer is reported as unchecked, never as clean.
What do Watch and At risk mean?
Watch means one signal is drifting the wrong way. At risk means a signal is bad enough to hurt your sending. Each label lists the reasons.
Do I need to set up DNS records myself?
For mailboxes bought from mailzy, our team sets them up. For your own, the checks tell you exactly which record is missing.
Everything for cold email, in one place.
Start free for 14 days. No card needed.