Outlook extra newlines

Hi Guys!

Today I’ve upgraded my RT from version 3.8.17 to 4.2.5
But I still have an issue with extra newlines being added by RT if
e-mail is sent to RT in html format from MS Outlook(2010/2013).
Sure, the option “Set( $CheckMoreMSMailHeaders, 1);” is added to the RT_SiteConfig.pm.

Do you have any ideas how to fix this?
Thanks in advance.

Vlad V. Shpolyanskiy VS4241-RIPE VS603-UANIC