Feature proposal #6981
Updated by krileon over 6 years ago
PHPMailer 5.2.10 introduced Opportunistic TLS where it tries to establish a secure connection if the server advertises TLS is supported. However, if the server does this then provides an invalid certificate it will fail. Joomla has implemented a workaround to ignore this feature as shown below. https://github.com/joomla/joomla-cms/pull/9528 Don't agree with workarounds for, likely, incorrectly for poorly configured servers. Recommending updating to latest PHPMailer library to see if that helps improve the accuracy of Opportunistic TLS.