Hello All,
I'm running Cyrus+Postfix+Amavisd-new (Spamassasin+ClamAV).
The problem is that non-encoded 8bit data is not allowed in message headers and
Cyrus-IMAPd prevents from any problem by replacing those chars with X.
A lot of emails my user get are coming from hotmail host with those XXX in
subject header.
Hotmail web-interface is not a standards-compliant mail program that does not
RFC 2047-encoding on all headers. Unencoded 8-bit characters aren't allowed in
headers. That's why Cyrus replaces them with X.
I thought I could solve it on the amavis level.
As you can see below, amavis warns about "BAD HEADER"
> X-Amavis-Alert: BAD HEADER Non-encoded 8-bit data (char F7 hex) in
> message header 'Subject'
> Subject: \367\345\370\361 \344\351\351\362\345\365\n ^
Is there a way to use function function encode($in_str, $charset) on Subject
header when amavis see the "BAD HEADER" in Subject?
Where should I enter the encode code?
P.S.:
Below is function encode($in_str, $charset) code:
$charset = "ISO-8859-8";
function encode($in_str, $charset) {
$out_str = $in_str;
if ($out_str && $charset) {
// define start delimimter, end delimiter and spacer
$end = "?=";
$start = "=?" . $charset . "?B?";
$spacer = $end . "\r\n " . $start;
// determine length of encoded text within chunks
// and ensure length is even
$length = 75 - strlen($start) - strlen($end);
$length = floor($length/2) * 2;
// encode the string and split it into chunks
// with spacers after each chunk
$out_str = base64_encode($out_str);
$out_str = chunk_split($out_str, $length, $spacer);
// remove trailing spacer and
// add start and end delimiters
$spacer = preg_quote($spacer);
$out_str = preg_replace("/" . $spacer . "$/", "", $out_str);
$out_str = $start . $out_str . $end;
}
return $out_str;
}
$subject = encode(($in_str, $charset);
Best Regards,
Leon Kolchinsky
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