I'm not sure if this has been asked and answer.
However, last night my Yahoo account was compromised.
I ran a scan and reset my password. However, now
I find that I can't sent out e-mails from the account.
I can however post on a group website as I am now doing.
Having done a little research, it appears that Yahoo
will sometimes institute this type of "stop" as a
temporary measure. I have tried to contact Yahoo but
my post (on the internet site) is not going through
either. Any thoughts?