I like that it lets you archive your emails from different accounts into one folder which makes searching through them easier, as well has having multiple clients in postboxes helps with organization when sending out mass messages to my contacts! It's easy enough (and cheap!) but not too much of an annoyance if they don't have all features necessary or are just looking at options/features available elsewhere online etc. If there were more ways than archiving via tags then this would be even better - especially since some people send over 100-200 mails per day!! Also adding folders within each client so we can keep our mailings organized was another thing suggested by someone else who used their service before me :) Great way organize incoming information thoughout various companies without cluttering up inboxes everywhere.