Attachment with utf8 filename

[hartois]

Rainloop 1.10.5.192, CentOS 6, PHP 5.6
php-pear-Mail-mimeDecode-1.5.6-1
php-pear-Mail-Mime-1.10.0-1

Attachment filename encoded in UTF-8 not parsed correctly:

Original filename: "Снимок экрана_2017-03-04_07-12-16.png"

From email source:

Content-Type: image/png;
        name="=?UTF-8?B?0KHQvdC40LzQvtC6INGN0LrRgNCw0L3QsF8yMDE3LTAzLTA0XzA3LTEy?=
 =?UTF-8?Q?-16.png?="
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
        filename*0*="utf-8''%D0%A1%D0%BD%D0%B8%D0%BC%D0%BE%D0%BA%20%D1%8D%D0%BA%D1";
        filename*1*="%80%D0%B0%D0%BD%D0%B0%5F%32%30%31%37%2D%30%33%2D%30%34%5F%30";
        filename*2*="%37%2D%31%32%2D%31%36%2E%70%6E%67"

Full message:
email.txt

[hartois]

Same on 1.11.0.203 version

[hartois]

I'm not sure that this is correct, but temporarily I solved the problem by changing giving attachment name from "filename" to "name":

--- rainloop/v/1.11.0.203/app/libraries/MailSo/Imap/BodyStructure.php.old	2017-03-14 10:49:17.641962464 +0200
+++ rainloop/v/1.11.0.203/app/libraries/MailSo/Imap/BodyStructure.php	2017-03-14 10:49:23.826789195 +0200
@@ -835,7 +835,7 @@
 					$aDispositionParams = self::getKeyValueListFromArrayList($aDispParamList);
 					if (\is_array($aDispositionParams))
 					{
-						$sFileName = self::decodeAttrParamenter($aDispositionParams, 'filename', $sCharset);
+						$sFileName = self::decodeAttrParamenter($aDispositionParams, 'name', $sCharset);
 					}
 				}
 			}