JavaMail and spam

Usually in Spam-Marked Mails you can see a comment of the filter telling you exactly why the mail was treated as spam.
Did you have a look at this? If not I doubt we can guess the reason for this.

Here is spam log

 pts rule name              description
---- ---------------------- --------------------------------------------------
 3.1 BAD_ENC_HEADER         Message has bad MIME encoding in the header
 0.1 FORGED_RCVD_HELO       Received: contains a forged HELO
 4.0 RCVD_HELO_IP_MISMATCH  Received: HELO and IP do not match, but should
 1.5 RCVD_NUMERIC_HELO      Received: contains an IP address used for HELO
-2.6 BAYES_00               BODY: Bayesian spam probability is 0 to 1%
                            [score: 0.0000]
 0.0 HTML_MESSAGE           BODY: HTML included in message
 0.0 MIME_HTML_ONLY         BODY: Message only has text/html MIME parts
 2.3 HTML_TINY_FONT         RAW: body contains 1 or 0-point font
 1.3 FROM_EXCESS_BASE64     From: base64 encoded unnecessarily
-3.5 AWL                    AWL: From: address is in the auto white-list

Well I guess having a look at this, it seems that the mime-encoding set in the header is not set or incorrect and the ip-address sent in the HELO command of the SMTP connection is wrong (if the remote server uses the name provided by the HELO to lookup the IP of the sender and this check fails). This usually happens when your sending server has local names and ip-addresses (it is inside a local network which accesses the internet via NAT or a Proxy).

From the 4th response your server is propably sending it's local IP adress, which the recieving host cannot access.

Iam not responsible for making mails. Java mail do this. Iam interested why changing java version make mail spam