To allow users to see your email address in the info command, set showemail on. It defaults to on.
Example:
/msg nickserv set showemail on
Use this only if you want to make your email address public. Remember, you might get email from anyone on the chat network. It might be good to set it on if it is a more private network and you want people to be able to easily contact you, or if you are a contact for something related to the chat network. For example, if you admin a server, you might want an email address that you use for chat related email to be public.