The mail server has a publicly-trusted SSL Certificate installed on the POP3 SSL port but there are intermediate certificate issues. The server has a publicly-trusted certificate, but it was never installed on the POP3 SSL port.
#How to fix insecure connection gmail mac install
If this is the case, you need to purchase and install one from a trusted CA like DigiCert®.
The server doesn’t have a publicly-trusted SSL Certificate installed. The mail server either has no certificate or a self-signed certificate on the POP3 SSL port. Here are a few possible reasons for this issue: The above error is caused by the absence of a publicly-trusted SSL Certificate on the mail server. If you do not have access to your mail server, we suggest that you contact your mail system administrator and request that the issue be fixed on the server. If you are the mail server administrator or if you have access to the mail server, you can troubleshoot and resolve this error using the steps below. If a certificate is not installed or if there is a problem, you may not be able to access to your third-party mail account and messages. When connecting Gmail to third-party mail providers, the provider’s server must have a valid SSL Certificate from a trusted Certificate Authority (CA) installed on the POP3 SSL port (default: 995, see below). By default, Gmail will now always use a secure (SSL) connection when retrieving mail. Gmail will also check to make sure that the third-party email provider’s remote server has a valid SSL Certificate. Note: You may also receive a protocol error or an ‘SSL Certificate expired’ error.Īs of December 2012, Google's Gmail servers are configured not to connect to remote POP3 servers that have either no certificate or a self-signed certificate. "SSL error: Unable to verify the first certificate." Due to Gmail’s recent enforcement of strict SSL security, you may have received something similar to the following error when attempting to access third-party email through Gmail:
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