Restrict how IMAP folders are downbloaded: by message size, headers, message body, attachment
1. allow downloads between body/headers/attachments, and message size e.g 4kB 16kB 48kB 128kB 512kB 1Mb 4Mb 8Mb 12Mb and everything.
2. Headers only, Headers and Body only, Headers Body and Attachments only.
3. Above setting applied to user selected folders.
Please retain existsing setting for age ( 1 month , 3 months, 6 months, 1 year and forever).