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Editorial Team
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Asked: 2026-06-05T20:05:27+00:00

I am having some serious problem with some e-mail issue. in short: loading a

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I am having some serious problem with some e-mail issue.

in short:

  1. loading a html template file fopen
  2. replacing some values, marked like this %password with real values str_replace
  3. sending mail via the following function, where $content is the loaded html template file:

public function send($receiver, $subject, $content){

    $header = "From:".sender. "\n";
    $header .= "MIME-Version:1.0" . "\n";
    $header .= "Content-type:text/html;charset=utf-8" . "\n";

    $mailText = $content;
    mail($receiver, $subject, stripslashes(iconv('utf-8', 'iso-8859-1', $mailText)) , $header);

}

the server is debian with postfix.

The Mail template starts with

<html> <body style="background-color: #fff;"> <table border="0"...

The thing is, and I cannot reproduce it, that in some cases I can find several spaces in the mail, which I didn’t put there. Most problematical are those in the user and password string.

Evering else seems correct! The encoding is ok, the html is accepted, all mails can be delivered …

password generation:

public static function create_password($length = 12) {
        $characters = array("a", "b", "c", "d", "e", "f", "g", "h", "k", "m", "n", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "_");
        $password = "";
        for($i=0; $i<$length; $i++) {
            $index = rand(1, count($characters)) -1;
            $password .= $characters[$index];
        }
        $password = str_replace("__","_", $password);
        return $password;
    }

Any Ideas, where to start my search?

Is it the template, str_replace, the postifix, the client, … ?

Thanks so far

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1 Answer

  1. Editorial Team

    I would start by saving the HTML into a separate file and open that with a browser.

    If you see spaces, it’s the HTML.

    If it looks fine, the mail gets mangled.

    Mangling

    This is often caused because your lines are simply too long and mail servers do funky stuff with lines longer than 80 columns (ancient standards).

    To prevent mangling I would suggest the following:

    1. Add header Content-Transfer-Encoding: base64.

    2. Apply chunk_split(base64_encode(...)) over the whole e-mail content.

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