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Manage external email warning
Update 07/07/2026
This guide explains what the "External" label means in the web app Mail (online service ksuite.infomaniak.com/mail) and the mobile app Infomaniak Mail (application for iOS/Android smartphones or tablets) when reading certain messages:
Introduction
- The "External" label is displayed in the following cases:
- The sender's domain name (or alias) does not match the email address configured in Mail.
- The sender is not in your contacts (including suggested contacts).
- The email comes from an address hosted outside the Organization.
- With certain free offers, such as my kSuite, the label will appear as "unknown" instead of “external”.
Enable or disable the label
You can enable or disable the label; the effect is immediate for incoming emails and when replying to an external email. To do this:
- Click here to access the management of your Mail Service in the Infomaniak Manager (need help?).
- Click directly on the name assigned to the Mail Service in question:

- Click on Global Settings in the left-hand menu:

- Click on the Security tab.
- Activate or deactivate the toggle switch:

Link to this FAQ: https://faq.infomaniak.com/964
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