Email not sent when inviting new users "block in start_queue_manager"

Elastic Search
4
  1. Can you confirm that the local email server is running on port 25?
  2. I compared the logs that I had and the logs that you sent and I found a small difference:
    You had:
    Performing Work::TogoMailer from EsqueuesMe(mailer)
    While I had:
    Performing Work::TogoMailer from Class(mailer)
    What version of Enterprise Search are you using? It should be under the logo in App Search UI.