Zimbra - ERR_SSL_PROTOCOL_ERROR

[BigZ25]

Hi
I just installed SSL certificate on my mail server.
The installation went without warnings, errors etc.
Before installation i made checking a compliance of certificates and there was no problems.

Now when i want to get into my mail server i got errors, for example in Google Chrome this is ERR_SSL_PROTOCOL_ERROR.

Anybody can help to solve this problem?

[BigZ25]

I checked SSL on https://www.ssllabs.com/ssltest and i got something like this:

[lingmaaki]

When a browser shows the Err_ssl_protocol_error, it indicates the browser is no longer able to access or initiate the secured communication. There is no definite guide for managing this error. Follow given steps to resolve this error from Client side:

Try correcting the system date and time.
Try clearing Google Chrome browsing data.
Try clearing your SSL State.
Try disabling the QUIC Protocol.
Try checking your antivirus settings.
Try enabling all SSL/TLS versions.

Also, this error is because of the following aerver side problems:

Invalid SSL or SSL is untrusted (self-signed)
SSL Not installed properly
Old Technology or SSL/TLS version for encryption