Hit ENTER after each Tag to add it to your post; Numbers in parentheses represent the Tag's usage.
In order to access your mail you must completely login each time. There is no session cookie that allows you to stay logged in if you close the interface. Also you have to completely navigate through home screen then select if you want mail or calendar or some other module and then if you want mail you have to select the inbox each time. In the non mobile version it takes you right to your inbox each time so the mobile version should have this option also.