I shared a folder with an external person. I typed in the email exactly. The person got the invite from Dropbox to create an account. Only thing is, the spelling of the domain name was slightly different. Easy to miss. So this person was not able to log in. I am worried of hackers but how is this possible the email is coming from Dropbox with the incorrect spelling? How do I know if my files were compromised? I unshared the folder but maybe too late. Anyone seen this?