Yahoo Mail Asking for a Code before Sending?

Before I am able to send an e-mail I am asked to enter a code. I know this was an issue a while back, but it seems to have returned.

Anyone know why? My e-mails are not unusual with links or obscure messages in them.
Update: Thank you ooops. That clears things up for me. I thought they were just being annoying. Seriously.
2 answers 2