This extension makes email consumption in Alfresco Share a little easier. Further details are at http://www.contentreich.de/von-menschen-lesbare-emails-in-alfresco-share
To install, just copy contentreich-eml-repo.jar to alfresco/WEB-INF/lib and contentreich-imap-share.jar to share/WEB-INF/lib. Restart Server, go to page /share/page/modules/deploy and activate.