php mail headers suggestions

[jobe1]

Good day everyone.

My current tiny email script seems to work good....email is sent as html and so far is displaying ok in outlook, gmail, hotmail, etc.

Only problem I have is certain spam filters. Gmail seems to let the email ok but hotmail does not.

the headers I'm using are:

// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\n";

// Additional headers
$headers .= 'To: ' . $POST['ebay_name'] . ' <' . $POST['ebay_email'] . '>, ' . $from['name'] . ' <' . $from['email'] . '>' . "\n";
$headers .= 'From: ' . $from['name'] . ' <' . $from['email'] . '>' . "\n";

$headers .= 'Return-Path: ' . $from['email'] . "\n";

the outputed headers in the email look like this

MIME-Version: 1.0
Content-type: text/html; charset=iso-8859-1
To: rdaivdl <[e-mail]>, RDLong Computers <[e-mail]>
From: RDLong Computers <[e-mail]>

Return-Path: [e-mail]

I was hoping to get some suggestions on what headers to modify/add help them not get filtered by spam.

Thanks all.

[bradgrafelman]

Is the from address a valid address for the server you're sending mail from? It might be reverse DNS that is causing the issue.

[jobe1]

Indeed it is a valid email address.