You could send her another email. I advise you however to stop speculating the reasons why women do the things they do during initial encounters. The reasons may vary and it might just push your tolerance level. Also, she does not have any obligation in the least to send you anything in response. Courtesy or not it is out of her own volition and it might just be the way she ends immediate affairs. It is just a natural form of reaction for people if they want to evade people or problem which is to ignore it complete, however it isn't what I suggest anyone to actually do. Rather you should fact it straight on.
Goodluck with the rest of the ladies!
Borealis
Be slow to fall into friendship; but when thou art in, continue firm and constant.