As of yesterday 4/20 at 5:32pm Pacific Microsoft is once again accepting our email.
So far we have received no communication from Microsoft stating that the block was removed however this does appear to be the case. All messages are being delivered as normal.
After reading the previous blog posts about the block if you have any additional questions about the block and/or undeliverable messages please direct them to our help desk at storesecured.desk.com or support email, ie support@storesecured.com