avoiding php emails going to spam or junk

Hi experts,

We are having trouble with our emails being junked by gmail, hotmail etc when we send our users messages from a php mail() call.  I have attached a basic outline of our emails... is there anything which might be jeapordising us, like the header info?  And are there any definitie rules to help avoid our mails being junked?

Thanks.
$theboundary = md5(uniqid(""));
$fromname="users email";
$fromemail="users email";
$subject="subject";

$header = "From: \"$fromname\" <$fromemail>";
$header .= "\nMIME-Version: 1.0";
$header .= "\nContent-Type: multipart/alternative;";
$header .= "\n        boundary=\"----=_NextPart_$theboundary\"";
$header .= "\nX-Priority: 3";
$header .= "\nX-MSMail-Priority: Normal";

$htmlmessage = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional //EN">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>our email</title>


<body>


some images and text
  
  
</body>
</html>';
$textmessage = 'some text';

$body = "This is a multi-part message in MIME format.\n\n";
$body = "------=_NextPart_$theboundary\nContent-Type: text/plain;\n\n";
$body .= $textmessage;
$body .= "\n------=_NextPart_$theboundary\nContent-Type: text/html;\n\n";
$body .= $htmlmessage;
$body .= "\n\n";

mail($email_list[$mail_no], $subject, $body, $header);

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RowdyBurnsAsked:
Who is Participating?
 
Dave BaldwinFixer of ProblemsCommented:
Are you sending your emails from a known and checkable email address?  
The first and second lines of your DOCTYPE are mismatched.  And there was no </head> in your sample though you have just left that out.

If this is bulk email, services like Constant Contact, iContact, and Aweber do this very well... since it is their business and they spend all day doing it.  See if you have any emails from them and look at the header formats and data they use.
$htmlmessage = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional //EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>our email</title>
</head>

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0
 
Vimal DMSenior Software EngineerCommented:
Hai,

I suggest you to use "PHPMAILER",

1) Can avoid spams
2) Bulk mailing
3) File attachment.
4) Then which supports all the email ids

All enough to do is,download the PHPMAILER class file and know to make use the functions available there.


Thanks
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