I'm sorry about the issue. I'm an independent computer support tech; I will help you with this.
When did this issue first occur?
Was there any change recently to your computer or email, or did you notice anything strange recently that may have caused this issue?
Do you have windows xp, vista, or 7, or 8, 10, or mac computer?
Can we do a remote support session, so I can troubleshoot the issue directly on your computer together with you?
Please reply at the box below. Thank you,
I have checked and found out that the ATT / Yahoo email server is down right now; it should be fixed within 24 hours. There is nothing wrong with your computer. Please try sending email tomorrow. You can always check the Yahoo email website / server status at the website below:
Do you need anything else for now? Please reply at the box below. Thank you.
As of 3:00PM Pacific time today (December 23rd), the AT&T / Yahoo email server is back up; it is working now. I have tested sending some messages, and it went through. Can you please please test sending some email messages and confirm? Also, do you need anything else?
When you are available, please reply back at the box below to continue. Thank you.