Interpretation of the local part of an email address is dependent on the conventions and policies implemented in the mail server. For example, case sensitivity may distinguish mailboxes differing only in capitalization of characters of the local-part, although this is not very common.[11] Gmail ignores all dots in the local-part for the purposes of determining account identity.[12] This prevents the creation of user accounts your.user.name or yourusername when the account your.username already exists.