yahoo mailer daemon spam

My att yahoo email started filling up with mailer daemon failure notice about an hour ago for some reason i have no clue how this happened i haven't clicked on any links how do i stop this?

Run a scan with Malwarebytes Anti-Malware free https://www.malwarebytes.org/

Disconnect from Internet after MBAM updates and starts the scan.

i also want to add after a couple minutes emails stop but when i delete the emails they start back

What do I do now that I deleted the malicious programs

If you have the slightest suspicions that your email account is compromised, change the password IMMEDIATELY. That would prevent anyone that tried to hack it from actually using it to do anything or lock you out of it.
Use a known-safe computer, not the compromised one. That way you make sure that a potential attacker doesn't gets the new password as well.

I talked to att and they told me the reason was that my account was suspended but they reactivated it after i told them my account was spamming and changed password

Is there a way to block email from spammer without clicking on the email to copy email address