PHP mail function

I am using the PHP mail function this is the headers

[COLOR=#000000][COLOR=#0000BB]$headers [/COLOR][COLOR=#007700]= [/COLOR][COLOR=#DD0000]'From: webmaster@example.com' [/COLOR][COLOR=#007700]. [/COLOR][COLOR=#DD0000]"\r\n" [/COLOR][COLOR=#007700].
    [/COLOR][COLOR=#DD0000]'Reply-To: webmaster@example.com' [/COLOR][COLOR=#007700]. [/COLOR][COLOR=#DD0000]"\r\n" [/COLOR][COLOR=#007700].
    [/COLOR][COLOR=#DD0000]'X-Mailer: PHP/' [/COLOR][COLOR=#007700]. [/COLOR][COLOR=#0000BB]phpversion[/COLOR][COLOR=#007700]();
[/COLOR][/COLOR]

Code (markup):

I am facing issues with the qmail and am confused whether to use "\r\n" or just "\n"
please share your comments on this issue.

 

[COLOR=#000000]echo [/COLOR][COLOR=#800000]'hi'[/COLOR][COLOR=#000000].[/COLOR][COLOR=#000000] PHP_EOL[/COLOR][COLOR=#000000];[/COLOR][COLOR=#000000]
echo [/COLOR][COLOR=#800000]"hi\n"[/COLOR][COLOR=#000000];[/COLOR][COLOR=#000000]

$headers [/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800000]"From: "[/COLOR][COLOR=#000000].[/COLOR][COLOR=#000000] PHP_EOL 
           [/COLOR][COLOR=#000000].[/COLOR][COLOR=#800000]"Reply-To: "[/COLOR][COLOR=#000000];[/COLOR]

Code (markup):

 

From the PHP manual:

"Multiple extra headers should be separated with a CRLF (\r\n).
Note:

When sending mail, the mail must contain a From header. This can be set with the additional_headers parameter, or a default can be set in php.ini.

Failing to do this will result in an error message similar to Warning: mail(): "sendmail_from" not set in php.ini or custom "From:" header missing. The From header sets also Return-Path under Windows.

Note:

If messages are not received, try using a LF (\n) only. Some poor quality Unix mail transfer agents (emphasis mine) replace LF by CRLF automatically (which leads to doubling CR if CRLF is used). This should be a last resort, as it does not comply with » RFC 2822."

 

You got it!