Chapter 5 · 5.1
A certificate error when opening Outlook
Do you get a security warning about the certificate when you open Outlook or fetch your mail? Then the server name you entered doesn't match the server's certificate. This doesn't mean your mail was sent insecurely, but Outlook can't check that it's talking to the right server.
What the message looks like
The wording varies by version. For example, you may see:
- a security warning that the name on the certificate doesn't match the name of the site;
- The target principal name is incorrect;
- a question asking whether you want to continue anyway.
The cause
- You use mail.yourdomain.com, imap.yourdomain.com or smtp.yourdomain.com as your server, and that name isn't in the certificate or doesn't point to your package.
- You use your domain name as the server, but your website is hosted elsewhere, or your domain doesn't point to us (yet).
- Your virus scanner inspects your encrypted mail and inserts its own certificate. In that case, you'll see the name of your virus scanner under Issued by.
How to fix it
- Look up your package's server name in My WebOké under My Products, in the Server column (see The details you need).
- Enter that server name, such as linux2023.webawere.nl, as your incoming and outgoing server (see Setting a new password or a different server name). You'll no longer get the certificate warning.
- If the warning comes from your virus scanner, turn off the scanning of encrypted mail in the scanner, or update the scanner.
Please note: Don't permanently dismiss the warning with "continue anyway" or "Yes". If you do, you won't notice when something really is wrong.
More information: Certificate warning in your email program and Certificate error when fetching mail.