as yahoo has been comprised i checked my e-mail address to see if it has been "got at" it had so i changed the password , so two days later out of curiosity i checked my e-mail address again and yes it had been got at so once more i changed the password and yes it has been got at again, my other e-mail address all 5 are ok (2 are yahoo) this e-mail checker is recommenced by many top see if your address have been hacked, i cant see as ive been hacked three times in a week
https://haveibeenpwned.com/