Recipient Guard
Recipient Guard
You type “Dave”. Outlook offers a Dave. It’s the wrong Dave. Recipient Guard pauses the send and shows you exactly who’s about to receive your message.
See how it works Free Outlook add-in · coming soonRecipient Guard paused a send. Please check the recipients are correct.
This message will be sent to:
Works everywhere you use Outlook — classic Outlook, new Outlook, and Outlook on the web.
It’s AutoComplete. One wrong pick from a dropdown and a message meant for a colleague goes to a stranger, a client, or someone’s personal address. Recipient Guard checks the recipients the moment you hit Send — and only interrupts when something genuinely looks off.
You’re emailing an address you don’t normally use for that person — caught even when it’s the only recipient on the message.
Two people sharing a display name, or the same username on different domains.
john.doe@acme.com vs john.doe@acme-invoices.com
Anyone outside your organisation gets flagged, so nothing leaves quietly.
No setup, no configuration. It works from the moment it’s installed.
See every recipient in one list, with the questionable one flagged and the reason why.
A cooling-off window that lists everyone the message is going to — with a cancel button.
Stop warnings for an address you email deliberately, or trust everyone at a domain you work with. Public webmail like gmail.com is deliberately excluded. Manage and remove trusted entries anytime from the pane.
Optionally learns who you usually email, so it can spot a single wrong recipient. One click to turn on.
Your email never touches our infrastructure, because we don’t have any.
All recipient analysis runs locally, inside Outlook, on your device. The only thing stored — your frequent-contact list and your whitelist — is kept inside your own Microsoft 365 mailbox using Office roaming settings.
No recipient data, contact data, or message content is ever sent to us or to any third party. Message bodies and attachments are never read.