--- /dev/null
+--TEST--
+Bug #12411 RFC2047 encoded attachment filenames
+--SKIPIF--
+--FILE--
+<?php
+include "Mail/mime.php";
+$Mime = new Mail_mime();
+
+// some text with polish Unicode letter at the beginning
+$filename = base64_decode("xZtjaWVtYQ==");
+$Mime->addAttachment('testfile', "text/plain", $filename, FALSE,
+ 'base64', 'attachment', 'ISO-8859-1', 'pl', '',
+ 'quoted-printable', 'base64');
+
+$content = $Mime->get();
+$content = str_replace("\n", '', $content);
+
+if (preg_match_all('/(name|filename)=([^\s]+)/i', $content, $matches)) {
+ echo implode("\n", $matches[2]);
+}
+
+?>
+--EXPECT--
+"=?ISO-8859-1?Q?=C5=9Bciema?="
+"=?ISO-8859-1?B?xZtjaWVtYQ==?=";