Support » Plugin: WP Mail SMTP by WPForms » Error Sending Test Email

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  • Plugin Author Slava Abakumov

    (@slaffik)

    As written in Debug output, there is a certificate file problem (most likely it just doesn’t exist or misconfigured).

    The error is:

    Peer certificate cannot be authenticated with known CA certificates.

    The only way to fix that is to contact your hosting support team with the Debug output of the plugin and ask them to fix the server settings. It lacks the correct certificate file. They should know what to do.

    Meanwhile, as a temporary solution, you can add this snippet to functions.php file of your child theme: https://gist.github.com/slaFFik/c1d7d4249f47da7195fb973109952090
    This may or may not fix the issue. But I highly recommend asking support to fix the server issue.

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