Protect your company from mistaken email recipients and attachments
MailApprove solves the problem of accidental data loss through outbound email — the single most common way sensitive information leaves an organization by mistake.
Every day, employees send emails at speed: replying quickly, adding recipients, attaching files. It only takes one slip — the wrong autocomplete address, an unintended 'Reply All,' a new external contact added to a sensitive thread, or a confidential attachment sent to the wrong person — for private data to leave your organization irreversibly. Once that email is delivered, it can't be recalled.
For enterprises, the stakes are high: regulatory penalties (GDPR, HIPAA, and similar), breach of client confidentiality, reputational damage, and loss of trust — all from a simple human error rather than a malicious attack.
MailApprove adds a critical human checkpoint before mail leaves your organization. It intelligently intercepts risky outbound emails in Microsoft 365 and asks the sender to confirm with a single click before delivery. It's smart enough to stay out of the way — auto-approving trusted internal traffic and only stepping in when there's genuine risk.
The result: you catch costly mistakes in the two seconds before they happen — not in the aftermath.
Small changes, big results
Small Changes, Big Results
Minimal data capture
We collect only the small amount of information needed to manage the approval process.
Secure handling
Emails are processed securely throughout approval and release.
Your policies still apply
Approved emails return to your existing mail flow — DLP, encryption, litigation holds, and routing rules all work exactly as before.
Accountability and Other Benefits
Catch human error
By having users confirm outgoing email before it's sent, you significantly reduce the risk of messages reaching the wrong recipient through a simple slip.
Contain compromised mailboxes
If an account is breached, MailApprove helps stop it from silently sending unwanted messages — one of the most common threats after a successful phishing attack.
Nothing to install for end users
All of this with no software required on user devices. Keep your auto-populate. Keep your web and mobile email clients.
Keep your auto-populate. Keep your web and mobile email clients. mailapprove.