This is custom code, so we will not be able to offer to much assistance with this.
but this liner:
$mailObj = mail($mailTo,$mailSubject,$mailContent,$mailHeader , "-f<info@logodesigngroup.com>");
does not look right to me, it should not have the greater than and less than brackets around the email address:
$mailObj = mail($mailTo,$mailSubject,$mailContent,$mailHeader , "-finfo@logodesigngroup.com");