Mail Help: From line in header

[Anon]

I'm having problems with the from line in the mail header. When I include a time stamp in in the subject line I get the following From: [e-mail] - NOT what I want...

====
Delivered-To: [e-mail]
Date: 5 Feb 2002 18:46:29 -0600
From: [e-mail]
To: [e-mail]
Subject: Test: 1012956389.7027

From: [e-mail]

This is a test.

If I don't include the timestamp in the subject line things are great! (registrar needs to be the sender)

===Delivered-To: [e-mail]
Date: 5 Feb 2002 18:46:57 -0600
To: [e-mail]
Subject: Test
From: [e-mail]

This is a test.

===

Anyone have a clue why including a timestamp in the subject would cause mail from root??

Any help appreciated

Thanks

<?

$email="[e-mail]";
$refno = utime();
$refno=sprintf("%10.4f\n",$refno);

sendmail($refno, $email);

function sendmail($refno, $email) {

     $to = $email;
     $header = "From: [e-mail]";
     $subj = "Test: $refno";

// $subj = "Test";

     $body = "This is a test.";

  if( mail ($to, $subj, $body, $header)){
     echo "Mail Successfully Sent!\n<br>";
  }else{
     echo ("Error Sending Mail");
  }

}

function utime()
{
$t=microtime();
$t=((double)strstr($t, ' ')+
(double)substr($t,0,strpos($t,' ')));
return $t;
}

?>

[Anon]

The problem was resolved by removing the '\n' from within sprintf() when generating $refno.

Changed from:
$refno=sprintf("%10.4f\n",$refno);

Changed to:
$refno=sprintf("%10.4f",$refno);

Perhaps some would like to explain this one...

[Anon]

Yeah, I can explain it.

PHP passes along whatever you put into the various arguments to mail(), and if you stick a spurious line ender in there, PHP will construct a mail header that includes it.

Since PHP already is ending the various named fields (From, Subject, To) with newlines, you wind up with a doubled line ender, right in the middle of your mail header.

In other words, a blank line.

The results are passed right along to sendmail (or equivalent). Since the Internet email standard considers a blank line to be the end of a valid mail header, sendmail examines the result, discovers that there's no sender actually included in the mail header, and inserts one. In your case, root.

In general, sendmail will always put something reasonable in the header if you leave out an important field.