mail() not working with headers

[solitario]

Hello all.
Once I put in the following headers, mail() stopped working. When I take them out, it works. Any clues? Thanks.

$headers='';
    $headers.='From: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='To: '.$array[0]['first_name'].' '.$array[0]['last_name'].' <'.$array[0]['txt_username'].'>'."\n";
    $headers.='Reply-To: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='Date: '.date("r")."\n";
    $headers.='Return-Path: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='MIME-Version: 1.0'."\n";
    $headers.='Content-type: text/html;charset=UTF-8'."\n"; 

[SambaNeko]

Echo out $headers after all of your variables have been inserted and see if they're valid. On the "To:" line, is $array[0]['txt_username'] an email address?

[kows]

try using a carriage return as well as a new line character:

$headers .= "From: David Miles <[email protected]>\r\n"; 

but, Samba's suggestion could also be the problem.

[visualAd]

Hello all.
Once I put in the following headers, mail() stopped working. When I take them out, it works. Any clues? Thanks.

$headers='';
    $headers.='From: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='To: '.$array[0]['first_name'].' '.$array[0]['last_name'].' <'.$array[0]['txt_username'].'>'."\n";
    $headers.='Reply-To: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='Date: '.date("r")."\n";
    $headers.='Return-Path: '.$sending_name.' <'.$sending_email.'>'."\n";
    $headers.='MIME-Version: 1.0'."\n";
    $headers.='Content-type: text/html;charset=UTF-8'."\n"; 

As well as complying with the RFC 2821 and terminating headers with <CRLF>, you should also ensure that the variables you have inserted into the headers do not contain <CRLF> (especially if they originate from a user entered form).

If you do not do this, a malicious user could insert their own headers (e.g. Cc:, Bcc: and attachments). Your web form could then be used as a spamming engine for Viagra pills