EML format support

[mbhkoay]

Feature relating to the index component

Would like to index eml files that are backup-ed to a folder, and if possible, view attachments related to the email.
Filtering based on metadata such as from, to, subject, etc would be great as well.

Got this idea from:
https://www.reddit.com/r/selfhosted/comments/k7u4ni/comment/gf3u4mg/

[dpieski]

possible c++ library from a quick search.
https://github.com/jstedfast/gmime