better handle SMTP errors

Duke-GCB / D4S2

Web service to facilitate notification and transfer of projects in DukeDS

MIT License

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Closed johnbradley closed 4 years ago

johnbradley commented 4 years ago

Save status and email text before sending emails. This will record data that can be used to resending emails in the event of SMTP errors.
Adds configurable email timeout setting. This will let the endpoints respond even if the connection to the SMTP server hangs.
Fixes exception handling to be python3 compatible