Hotmail.com Email
There are some issues with hotmail email delivery for group/list messages right now.
Microsoft stopped supporting hotmail in 2012 and discontinued their postmaster accounts where you could report email concerns. Many other developers who work with group/list based sending of email are complaining that they are also having issues with hotmail so developers are wondering if Microsoft is using hotmail as their testing ground for some of their upcoming email changes for list based sending systems.
We are already deep in the process of testing a new email configuration that addresses all of the upcoming changings coming to some of the major email providers over the next few years. Although some of them are still defining their rules and plans we have enough information from developers who have been beta testing the changes to know the general direction. Some of the developers making these changes that should not be required yet are reporting improved hotmail delivery so it is becoming clearer hotmail may be their Guinea pig for testing those changes. This is definitely happening to other systems that allow their users to create their own lists and send emails to those lists.
In the meantime users with a primary hotmail.com email address may wish to add a free gmail account to your alternate email addresses under Member Functions > Edit Contact Info >