Problems with IMAP (BASE64 encoded mails, multiline headers)

Problems with IMAP (BASE64 encoded mails, multiline headers)

Hi!

By now there are two problems that make the IMAP access unusable for me.
  1. Zoho seems to decode the body of base64 encoded mails (Content-Transfer-Encoding: base64)
  2. When a header consists of multiple lines Zoho seems to fetch only the first line.
The first problem means that Zoho already had decoded the mail. But since the header is still there the mail clients are trying to decode the already decoded mail again. This produces unreadable mails:
�F�r�y�(�v��צ>�-�J%�׫��s��Ҋ�� 蛍��] zg��m���h�u��z�Z�ק {k���m��m5Җ��'��+-��i��"�*b��^�����{��M5�Uh��Z��,���^�

The second problem means that subject lines are shortened in the overview and that the threading is incomplete. For example: 
Subject: Re: [Aktive]
     =?utf-8?q?Vertagte_Antr=C3=A4ge_der_BuVo_Sitzung_vom_21?=
     =?utf-8?q?=2E1=2E2010?=

In the overview all tested mail clients only show "Re: [Aktive]" in the subject. So I guess that the corresponding IMAP command only fetches the first line and not the two following. 

Michael