Script: inbox-imap-shellpass
A script that shows if there are unread mails in your IMAP inbox.
This script actually use IMAPs. curl can also handle unencrypted IMAP. You only need to change the protocol in the command.
The login data can be stored in your pass password manager.
Dependencies
curl
Module
[module/inbox-imap-shellpass]
type = custom/script
exec = ~/polybar-scripts/inbox-imap-shellpass.sh
interval = 60