Forward mail from gmail IMAP to a callback URL or job worker, simply

 mail_room is a configuration based process that will idle on IMAP connections
 and execute a delivery method when a new message is received. Examples of
 delivery methods include:
 POST to a delivery URL (Postback)
 Queue a job to Sidekiq or Que for later processing (Sidekiq or Que)
 Log the message or open with LetterOpener (Logger or LetterOpener)