I have a form that I cannot get to validate on Westhost. I think the issue resides in this syntax (although I am no phpo expert):
// SMTP EMAILS
$smtp_use = "yes"; // set to no if you do not want to use SMTP
$smtp_host = "mail.xxxxxx.com";
$smtp_auth = true;
//$smtp_secure = "tls"; not sure what, or if, this should be set to
$smtp_user = "account-username";
$smtp_pass = "account-password";
$smtp_ssl = "no"; // set to no if you do not need to use ssl
$smtp_port = 25; // or try 2525, 587 or 465;