Reset SMTP session after error with keepalive (#2138)
Reset SMTP session after error with keepalive (#2138)

Fixes: https://github.com/PHPMailer/PHPMailer/issues/2137
jimjag/PHPMailer,jimjag/PHPMailer,nawawi/PHPMailer,nawawi/PHPMailer,PHPMailer/PHPMailer,PHPMailer/PHPMailer