how do I unblock an email sender

All of a sudden my most important email recipient is blocked. How do I unblock? I use mac mail.

While this is true across my apple devices (iPhone, iPad mini), I am currently on my iMac OS 10.10.4 (yosemite)

iMac, OS X Yosemite (10.10.4), mac mail server

Posted on Aug 31, 2015 1:37 PM

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how do I unblock an email sender

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