A recent client had us setup an Event Receiver that distributes a link or even the complete post of a blog site to selected users by group. The purpose of the group is that the distribution is sometimes company wide and sending out individual emails is obviously not an option.
When first setup, the client could not get it to work - after all, an email address is an email address, right? Not so with SharePoint - it does not support standard (aka: Outlook) distribution groups, it only supports global.
However, we found a workaround - this will work for you with SharePoint Alerts and in the event you need to setup a email send via an event receiver or App.
Three simple steps:
- Create a distribution group or use an existing, change type from Universal Distribution to Universal Security.
- Navigate to the group in the Exchange Admin Console (Management Console) and edit properties to allow "Senders from inside and outside my organization" under delivery management. (If delivery is restricted to a group of users, make sure the user sending the email/alerts is included in the list)
- Navigate to the Exchange Management Shell and change "Require that all senders are authenticated" to "false"