Adobe Sign

Anyone having issues with Adobe Sign, specifically email deliverability?

It seems to have started this morning, instead of the usual sender address header as adobesign@adobesign.com, it was spoofing the sender's address so it would come from username@company.com instead. This meant our anti-spoof policy was rejecting these Adobe Sign signature emails - I have since created a rule to accept spoof emails from the adobesign.com and echosign.com domains but users are still not getting emails delivered - they're not even appearing in our email system, its as if they were never sent (looking at Adobe activity page in one of the e-sign agreements, I can see that the email to some of our users gets bounced.)

Again this only started happening from this morning - UK time.