* Check log type and log into correct logger handler.
* Per-maillist restrictions:
- Verify recipient address is mail list.
Show sender & recipient in logging.info.
- Handle multiple access policies.
- - Always convert value of access policy to lower case string.
- - Set filter attributes in config file instead of hardcode here
- - If access policy is 'memberOnly', how about a fake email address?
- - Set logging level in config file.