SharePoint Calendar E-Mail Extension – Issue receiving e-mail

There is a problem with a March Hotfix which is wrapped up in the April 2012 CU for SP2010.

It runs into problems with Quotas (even if you didn’t have one defined). It is fixed in the June 2012 CU.

If you search Google you will find it, but here is a discussion about it:

http://blogs.msdn.com/b/george_bethanis/archive/2012/05/25/sps2010-cannot-send-incoming-emails-to-lists-libraries.aspx

(Thanks Michael!)