I would love to use this on my iCloud mailbox. It seems odd to use the Gmail API instead of IMAP. Hopefully that becomes supported in the future because the project seems great.
I started with the Gmail API because: - better performance vs IMAP for large mailboxes - easier access to size metadata per message
That said, IMAP support is something I definitely want to add. Especially for iCloud/Outlook users.
If I did add IMAP, would you be okay with: - slower scans - slightly less accurate size estimates
Or is parity with Gmail important?