Spammer bots using yahoo exploit to bypass filters. Video link in message body.
I made a quick recording of the exploit in action. Message body turns to garbage when selected and the "from" tooltip fails to load. This seemingly prevents any filters from properly assessing the subject line or the return address. The video is only accessible from the link provided.
Could you please message us on Twitter at @YahooCare or on Facebook at Yahoo Customer Care? We'd like to look more into the issue you're experiencing. In case you do not have a social media account, we are also available at: help.yahoo.com
Looking forward to your reply!
Yahoo Mail team