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I suddenly cannot send email from my MacBook Pro but my iMac desktop with the identical settings works just fine. I have both operating with OS10.10.2 and ver. 8.2 for mail. Hope I can get some help with this problem.
iPod shuffle, Mac OS X (10.6.8), MacBookpro
Mail troubleshooting - Yosemite
What does Mail/Window/Connection Doctor Show? If the server is red, select it and look at the Show Details box.
Troubleshooting sending and receiving email messages
Cannot send emails from my MacBook Pro
