Sounds like you are giving PHP sendmail a bad email address.
I tried it with different email addresses and none of them worked. I read in this forum that it has to be sent FROM my email address (kimberly@mcdonnellcompany.x10.mx), not the email address entered in my contact form (by the person filling it out). I originally had it going TO my yahoo email address and then changed it to my
kimberly@mcdonnellcompany.x10.mx email address, but I still keep getting the Mail failure - malformed recipient address message in my inbox.
The following is what my sendmail.php file contains:
<?php
$name = $_REQUEST['Name'] ;
$email = $_REQUEST['E-mail'] ;
$state = $_REQUEST['State'] ;
$fax = $_REQUEST['Fax'] ;
$message = $_REQUEST['Message'] ;
$all=
"E-mail: ".$email."\r\n".
"State: ".$state."\r\n".
"Fax: ".$Fax."\r\n".
"Message: ".$message."\r\n";
mail("kimberly@mcdonnellcompany.x10.mx", "Feedback Form Results",
$message, "From:
kimberly@mcdonnellcompany.x10.mx", $all);
header("Location: http://www.mcdonnellcompany.x10.mx/thankyou.html");
?>