Unable to save filters in the Plesk Horde webmail: Failed to establish TLS connection

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    Christian Grenier

    That problem may be a wrong installation or application of your SSL certificat at the mail layer of the Plesk server. Check your certificat with a SSL checker, if you notice any error, re-apply the certificat to the mail Layer on the server and restart Dovecot. That solve my problem twice.

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    Nelson Leiva

    Hi Christian Grenier,

    Thank you for the comment! I'm sure it can be helpful for other users experiencing similar issues.

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