Block from quarantine. What does it do?

If you don't know why MDO is taking the action it is performing then it's difficult to say how you could change the config to permit the Inky-stamped items through. If the problem is an anti-spam filter then you can write a mail flow rule to detect the Inky pattern in the content and deliver a notice to you complete with the original e-mail as an attachment. If however the problem is a malware or high-confidence phish verdict then you need to consider more exotic solutions such as appointing your mailbox as a Secops mailbox or writing an anti-phishing policy just for your mailbox that effectively turns the defence off.