Linefeeds in Email Headers

[eluser]webthink[/eluser]
Hi,

Thanks for looking into this!

Using SMTP with authentication, Codeigniter 1.6, but have worked with the newest email library, to no avail.

Server is a pretty standard LAMP CentOS/Qmail setup at Servint.

It all comes down to the newline and crlf values.


$newline = "\r\n";
$crlf = "\r\n";

This works for almost everyone, except some servers return the email complaining about invalid headers.


If I change crlf to '\n', qmail refuses to send it:

Qmail fails with:
'451 See http://pobox.com/~djb/docs/smtplf.html.
The following SMTP error was encountered: 451 See http://pobox.com/~djb/docs/smtplf.html.
Unable to send email using PHP SMTP. Your server might not be configured to send mail using this method.'

If I then try:

$newline = "\n";
$crlf = "\r\n";


It works, except major ISP's like Yahoo and Comcast reject the mail.