This is something I've been dealing with for a little too long.

AOL has a big list of methods they use to block what they think are spam. Some of these things are:

- Reverse DNS Lookups: If you don't have an entry, your mail is dumped
- Mail Formatting: If the format of your message is not RFC Compliant, your mail is dumped.
- Open Relay Lists: If your IP is on a blacklist, your mail is dumped.
- MX Record Lookups: If the domain of your address does not have an MX record, your mail is dumped.
- Dynamic IP Lists: If you are on a (known) dynamically assigned IP address, your mail is dumped.
- Message Content: If your message contains obfuscated (hex-coded) URL's, your mail is dumped.
- Rolling Blockouts: Aol has been known to block whole blocks of IP's just because they feel like it.

The list goes on like this for awhile. For more info, pay a visit to




That's not always true.

I just sent mail using php to my AOL account, and it worked. The smtp mail server doesn't have a reverse dns lookup.

His problem might be that the SMTP server he is using my be on the black list.

This will cause a ton of problems.

It took me 3 weeks to get off that list!!!


Instead of sending it like this...

mail($email, "application submitted", $message, "From: [EMAIL PROTECTED]");

Do something like this...

$text = stripslashes($text); $subject = stripslashes($sub);

        $header = "From: $From\nReply-To: $From\n";
        $header .= "Cc: $cc\n";
        $header .= "MIME-Version: 1.0\n";
        $header .= "Content-Type: text/plain\n";
        $header .= "Content-Transfer-Encoding: 8bnoit\n\n";
        $header .= "$text\n";

mail($To, $subject, "", $header);

I alwasy like working with strings....


-----Original Message-----
From: RJameson [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 19, 2004 9:12 AM
To: php-db
Subject: RE: [PHP-DB] Re: mail() function and AOL users

I'm quite sure it's not a problem with the mail function. It's probably the reverse dns configuration on your SMTP/sendmail server. AOL & Verizon have been two real sticklers for that.

If you know the IP address that your server is sending the email from
you can use this:

To check the revers dns resolution. You may be surprised.

<>< Ryan

-----Original Message-----
From: Manuel Lemos [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 18, 2004 10:28 PM
Subject: [PHP-DB] Re: mail() function and AOL users


On 12/12/2003 04:34 AM, Matt Perry wrote:

I use the following php mail function in an online applicaiton


mail($email, "application submitted", $message, "From: [EMAIL PROTECTED]");

This function does not always work when I modify $message. I have checked for null values for $message already but this does not seem to

be the problem.
I am trying to develop some sort of pattern of when this function works and when it does not.
The only essential difference between the values I pass in for message

is the one that does not always work includes a link. Apparently anyone useing AOL email is particularly vulnerable to this problem.

Is it likely that AOL and other mail servers sometimes block any email

from a web site if it has a link in the main body? Or should I not be

useing mail() in this manner to begin with?

Maybe you are not generating the message headers and body properly. Without seeing the code that you use to define $message, it is hard to

I just suggest that you try this class to properly compose and send your

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