Hi support, I started experiencing this a few months ago, I noticed that the spell check as you type was not working in my email ( I use this one for 90% of my emailing) (also one only, its a hotmail account. the other hotmail account, and two other google accounts work normally).. in the options the check mark is on for that feature, I can do the spell check above and that is normal, but it wont auto underline incorrect words OR even if I right click on it it doesn't identify them.. The only thing different about this email compared to the other 4 is that I have a custom coding signature so that everytime i start a new composition it auto loads my signature, (which is jpeg and text ) But this has been fine/working for years..