sent emails are empty after changed from Mimemail

My whole email is empty;/
As follow:

Content-Type: multipart/alternative;
    charset=utf-8;
    boundary="c1faa086dc0f1ca25adc9459f3b3ca94"
MIME-Version: 1.0

This is a multi-part message in MIME format.

--c1faa086dc0f1ca25adc9459f3b3ca94
Content-Type: multipart/alternative;
    boundary="5269f32fad6131756c54455f01948fdb"
Content-Disposition: inline
Content-Transfer-Encoding: 8bit


--5269f32fad6131756c54455f01948fdb
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: base64



--5269f32fad6131756c54455f01948fdb
Content-Type: text/html; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: base64



--5269f32fad6131756c54455f01948fdb--

--c1faa086dc0f1ca25adc9459f3b3ca94--

I've changed to mimemail and receiving emails with "n.d." content;/
Any clue?
#362521: 'n.d.' mails