Allowance of Wildcard '*' in folder setting

[thekofimensah]

It would be useful if I could access multiple folders in one imap input by using the * wildcard character.

For example if I have 10 subfolders in my gmail, and I'd like to import them all in one go, I'm not aware of a way to do it other than importing each one one at a time (This may be an outlook only problem because any parent folder other than the inbox doesn't show the contents of its subfolders). Ideally, the wildcard could work as it does in the file input (see https://www.elastic.co/guide/en/logstash/current/config-examples.html under "Using Conditionals")

Or for a concrete example: folder => "Inbox/Subfolder/*"

[jordansissel]

I don't know enough about IMAP to implement this today, but I like your idea.