0.6
  - Added CLIENT and SERVER variables to VirusAction script environment.
  - Even better logging for network errors and filter warnings.
  - Print out proxsmtp version in debug logs
  - Allow configuration of server keep alives (NOOPs). Default to none

0.5
  - Added sample scripts.
  - Initial fork from clamsmtp version 0.9.x
  - Converted into filter based SMTP pass-through