Does archiving limit searchability of older messages? If so, to what extent? Details: My general setup: mac running Sierra, backup with Time Machine. I use POP for all incoming email and remove it from server when fetched. I sort incoming email into a large number of folders, but over time my inbox folder, sent folder and a couple of other folders related to what I do have become quite large (hundreds of MB's). Up to now I have eschewed the use of archiving because I rely heavily on searches to find past correspondence and sometimes I need to reach deep into the past. Lately I've noticed that my hourly Time Machine backups are much larger than I expected and I've come to realize that the few mailbox folders that contain hundreds of MB's of messages are the probable culprits. So ... I'm thinking archiving will help me mitigate the problem of huge backups. But I fear that if I archive, I won't have the same ability to conveniently search archived folders using the same facilities TBird provides to search unarchived (more recent) messages in folders.