SharePoint 2010 missing some – not all – incoming email settings

I just found out today that when you enable an Email Event Receiver / Handler on a site, then all of your document libraries on that site “lose” the bottom half of the incoming email settings page – the “E-Mail Attachments”, “E-Mail Message”, “E-Mail Meeting Invitations”, and “E-Mail Security” settings.

Please see this post for more information and screen shots of what I’m talking about:  http://blogs.msdn.com/b/malag/archive/2009/05/13/attachments-disappear-with-custom-email-event-handler.aspx

It seems to be from reading this post that you have to implement all of the functionality yourself that the document library incoming email would normally have implemented itself.  That’s why the settings aren’t there – you control all of that through your code.