zimbra with hylafax notify

[azer]

Hi,

Sorry for my bad english I’m a french people.

When I receive a notify message from hylafax on outlook, the subject of the message is correctly formatted.
But if I receive it on a zimbra webmail, the subject looks like this :

Sujet : =?UTF-8?B?Vm90cmUgdMOpbMOpY29waWUgw6AgZGVzdGluYXRpb24gZG UgMDQxMzQxNjMyNSBlbiByZ

Any idea to solve this problem ?

I have asked on hylafax mailing list. Here's the response :
"so zimbra's webmail doens't support UTF8 encoded subject text? sounds like a bug in zimbra..."

Is that a possible bug ?

thanks for your helps.