There was the same problem on my web site and following manual adjustments probably will help. It worked for me.
Step 1:
cvCard contact form server domain is “server@yourdomainname.com”
This seems hardcoded (not sure why)
So I created an email account named “server”, activated and configured it.
Step 2:
I wanted to send email from my contact form to my gmail account which requires SMTP configuration. Download WP-Mail-SMTP plugin, activate it and configure it according to your host.
Step 3:
Use wp_mail() function instead of php mail() function.
Under Appearance tab, click Editor.
– Select “cvCard” theme from the combox on top-right corner.
– Select “send-mail.php” file from the templates panel
– Find and modify the line : $mail_result = mail( $to, $subject, $body, $headers );
as $mail_result = wp_mail( $to, $subject, $body, $headers );
– Click Update File button to save