I have a date coming up. My provider only communicates by email. Is it ok to write to her about what type of panties I would like to see her in?

...you get there and she is assured you're not a freak.  Better yet, you can buy the type of panties you'd like to see her in and bring them to her as a gift.  Keep the receipt for proof in case she thinks they're used, lol.

Ahh Thanks!

Victoria Secret is always a go to shopping destination for lingerie. Don't forget to get it gift wrapped.  Check her web site for her size.
Some ladies have gift lists on their web site.
Good luck

this be by color or referencing her pics on her web site.

While common, specifically asking about panties might be a question better reserved for date #2.  Most ladies ask anyway.

Thanks everyone.