Allow deletion of ads without the $5.00 upcharge. That's extortion; never seen anything similar from other providers.
Add "spell-check". There is none, at least that I can find. That's ridiculous!
Add "undo" and "redo" options. Again - they do not exist, at least that I can find. Also ridiculous.
The interface is awkward and clunky.
In short, Yahoo email is in the "dark ages".
66th
ranked