I've been informed by several of my Yahoo Mail contacts (namely family) that they've been routinely receiving email spam, with my account listed as the sender. I took a look at a couple of these emails, and it is usually written in the form of "Hey 'Contact Name', check out this website!" followed by a link that is immediately flagged as dangerous by most antivirus/spam filters. The messages are also sent out to multiple contacts at once.
I'm looking for advice on how to handle this situation, as I can't find any sort of support line for Yahoo Mail. I've been thinking of just nuking my account, as it's become more and more obsolete, while Gmail is far less likely to receive spam. But there's a lot of important places that has my Yahoo account on file, and it would be a bit of a pain to have them all changed.
So I hope you can help me take care of this annoyance.