Updated FAQ

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M66B 2021-01-23 11:45:16 +01:00
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FAQ.md
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@ -413,6 +413,9 @@ See also [this FAQ](#user-content-faq16).
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*... Invalid security certificate (Can't verify identity of server) ...*
This can be caused by using an incorrect host name, so first double check the host name in the advanced identity/account settings (setup step 1/2).
Please see the documentation of the email provider about the right host name.
You should try to fix this by contacting your provider or by getting a valid security certificate
because invalid security certificates are insecure and allow [man-in-the-middle attacks](https://en.wikipedia.org/wiki/Man-in-the-middle_attack).
If money is an obstacle, you can get free security certificates from [Lets Encrypt](https://letsencrypt.org).