Why is my Yahoo email not being received?

I sent out 7 messages to potential employers with resume attached. Then I sent myself something from Yahoo to my other email address and I received nothing. I tested yet another one of my email addresses, and nothing still. I am concerned that the employers have not received what I need them to see!!!!! HELP! PLEASE!

Why is my Yahoo email not being received?
i am having the same issues, I think it is an issue with yahoo all together, try emailing yahoo thought the help form to alert them of multiple issues