After (of course, *after*) sending my query to an agency that said "Email Query Only," I realized that the italic fonts from my email program didn't follow through - even though I chose send with HTML . I discovered this faux pas because I BCC'ed to my home email account to have a copy.
Instead of italicizing my titles, it puts slashes around them /My Title/. So now, do I look like a complete nitwit? Is there a chance they will understand it is an email snafu (although, yes I should have double checked before sending)?
Thanks. I'm going to drink gin into nitwittery oblivion.
Since I do not do anything to email queries other than sneer, I'm probably not the best source of info about how agents view "typos".
I will say this though: since you have no idea what program someone is using on the other end, anything other than plain text can get garbled. I know this from the email I get from y'all with questions. You would not believe the black dots, quotes out of place, weird ass stuff that arrives in your emails. I think it's from the cut and paste stuff.
Obviously the answer is to check first (as you yourself pointed out). Someone could make a fortune offering that service: "Send me your query, I'll tell you if you have format problems".
(which beats the hell out of threatening to kill the dog for money on this site)