* Initial save to disk
* Store unsent messages to disk so they can be retried later
* Set back not sending emails
* Fixed decorator
* Add general exceptions to the catchall
* Have dummy server just to make sure
* Added several server test cases
* ADded tests for bounced and error status
* Moved dir creation to config parse time
* Set LOG.e
Co-authored-by: Adrià Casajús <adria.casajus@proton.ch>
