I tested also on 4.0d and I am experiencing the same issue. My mail from default is set to a no-reply address, and mail from enabled is set to false, invite and rule emails send as me logged in as a user, and not my no-reply address.
Thank you for the reply, I am new to alfresco and did not realize there is a nightly build. Sorry for not understanding but what do you mean by backport?
Thank you I downloaded the 4.2a files and deployed the new war files. Is the process correct by just deleting the share and alfresco folders and rebooting?