Dear SimpleDoYou and Miranda, i’m having exactly the same problem. i have used wp mail smtp plugin to test certain global configuration and sent a test email successfully.
but when it comes to cForms, it never worked as it was intended for.
i have applied your coding modification on lib_email.php with no success.i used my email username (not database username) and domain_name.com
i’m very interested to know what .ini file your administrator had supplied for you Mr SimpleDoYou.
any solution will be deeply appreciated
thank you