Phpster wrote:



On Apr 21, 2009, at 20:32, Edward Diener <el...@tropicsoft.com> wrote:

I have a PHP script which uses the PHP 'mail' function. When the script's 'to' address is an AT&T address, such as my own as an AT&T ISP customer, the mail never gets to me. If the 'to' address is anything other than an AT&T address, the mail gets to the recipient. The PHP code for sending the mail is essentially:

   $headers  = 'MIME-Version: 1.0' . "\r\n";
   $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
   $headers .= 'From: Some From Name <somefromname.com>';
   $to = 'mybellsouthaddress.net';
   $subject = 'Some Subject';
   $msg = 'Some Message';
   if(mail($to,$subject,$msg."\r\n\r\n",$headers))
       echo "good";
   else
       echo "bad";

In the actual PHP script the $to, $subject, and $msg are successfully passed to the script from the client side as $_POST, $_POST and $_FILES parameters respectively. I have just filled them in above so that they can be seen as if they were part of the script. The script always returns "good", so the mail function must be successful.

In my project, testing has reported that any attempt to use the 'mail' function on the server to send to an AT&T address fails to reach the recipient, while all other addresses used in the testing succeed in reaching the recipient. I can assert this to be the case with my own AT&T address also. I have also checked my AT&T mailbox online to make sure the mail is not being received as Spam.

Does anybody have an idea why using the 'mail' function succeeds with all but AT&T $to addresses ? Naturally in the client-server application on which I am working, sending mail from the server must work for all $to addresses.

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It might be that the server IP has been blacklisted with at&t as a domain from which spam is sent.

I have found out that the server adds a from header of
'nob...@myserver.com' where 'myserver' is the name of the server. This header gets placed first before the From header I supply in my PHP script ( which should have had the form in the example above of 'somefromn...@myserver.com, my bad ).

Perhaps the AT&T mail server, when it sees the 'nob...@myserver.com' treats it as spam and does not deliver the mail to even the recipient's spam mailbox.

I am not sure if it is normal for outgoing SMTP mail servers to automatically add the 'nob...@myserver.com' from address first in the header, or even why it does so ? Does anybody know if this is normal for mail servers to do this ? Evidently other incoming mail servers do not react to the 'nob...@myserver.com' in any way, so maybe AT&T is unique in this.

Any light anyone can throw on the 'nob...@myserver.com' address would be most welcome.

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