Yahoo Temporary Errors 45 & 46 are sometimes a problem that will fix themselves.
Sometimes it's related to a software conflict between Yahoo and your computer.
First, try switching to the basic version of Yahoo Mail.
Then try clearing your cache, clearing your cookies, and scan your computer with Malwarebytes.
If that doesn't work you can continue to troubleshoot the problem with the steps in this guide:
http://www.emailquestions.com/yahoo...nts-connection-problems-browser-timeouts.html
Sometimes it's related to a software conflict between Yahoo and your computer.
First, try switching to the basic version of Yahoo Mail.
Then try clearing your cache, clearing your cookies, and scan your computer with Malwarebytes.
If that doesn't work you can continue to troubleshoot the problem with the steps in this guide:
http://www.emailquestions.com/yahoo...nts-connection-problems-browser-timeouts.html