Connection Error 401, 1401 on Win 7 and older

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Connection Error 401, 1401 on Win 7 and older

Post by Christian »

If you experience sudden connection problems (error code 401 or 1401) in PopMan running on Windows 7 or Windows XP, the reason is probably that your e-mail provider requires a secure connection using protocol TLS 1.2 or higher.

PopMan uses the encryption libraries of the Windows operating system. Windows 7 and older Windows versions by default do not support TLS 1.2. Therefore, PopMan is unable to establish a TLS 1.2 secured connection to your e-mail provider.

To fix this, you can enable support for TLS 1.2, e.g.: ... ows-7.html
Christian Hübner
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