How to set an email account in, for example, Outlook?
You can set up your email account on a computer or mobile device using an "email client". Before you start, make sure you created the email account in the Control Panel.
Tip: An email client is a software program, for example Outlook, Thunderbird or Mail, that you can use to send and receive emails.
What settings should I use?
Depending on the client you are using, the setup will be different, but usually you need the following settings:
Username: your full email address
Password: the one you set when you created your account
Incoming server: imap.one.com
Incoming server port: 993 + SSL
Outgoing server: send.one.com
Outgoing server port: 587 + TLS/SSL/STARTTLS (or 465 + SSL/TLS)
Outgoing server authentication: same username and password as the incoming server
We recommend using IMAP to set up your email account because it synchronises your emails across all devices and Webmail. Unlike POP, which downloads your emails and removes them from the server and Webmail.
If you prefer to use POP, you need the following settings for the incoming server:
- Incoming server: pop.one.com
- Port: 995
- Encryption: SSL
Setup guides
We've created step-by-step guides on how to set up your account for the most popular email applications:
- Setting up mail in Microsoft Outlook
- Setting up Gmail on Android
- Setting up Thunderbird
- Setting up macOS Mail - Sonoma and Sequoia
- Setting up mail on iPhone (iOS 18)
- Setting up mail on iPhone (iOS 26)
- Setting up macOS Mail - Tahoe
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