The title says it all.

Before going any further, I should mention, in this instance, I am running Outlook 2013.

For a long time now, I have added client domains to my Outlook Safe Senders Junk E-mail Options to ensure they safely arrive in my inbox. For years, I’ve never really had any issues. That said, in the past several month, maybe longer, more and more e-mails are ending up in my Junk Mail folder. I would double check and validate the domain was properly listed, yet the e-mails kept going in the Junk Mail folder.

So I started entering each individual e-mail address into the Safe Sender list and now they seem to have stopped going into Junk Mail.

I also had a conversation with fellow MVPs in which several stated experiencing the same issue while others never had any problems?  So trying to find the root cause does appear to be elusive.

There are also posts online of users experiencing this, for instance:

Moral of the story, domain level Safe Senders (@domainname.com) no longer appear to be reliable.  So be sure to add individual e-mail addresses to your Safe Sender list.

Update

Sadly, things are worse, even complete e-mail addresses in the Safe Sender list still go to Junk E-mail, learn more by reading:

Outlook's Safe Sender Doesn't Work

This is a continuation on my previous post Sadly, things appear to be worse than just domain level Safe Senders not being respected.  It would appear the issue goes to specific E-mail addresses as well.

A Few Resources on the Subject

Safe Senders in Outlook.com

To ensure messages from known addresses or domains don’t get moved to your Junk Email folder, add them to your safe senders list.

Add recipients of my email messages to the Safe Senders List

Automatically add recipients of your email messages to the Safe Senders List to prevent messages from being moved to the Junk E-mail folder.