Log Message:
Update to 20201010.0. From the changelog:

New features:
- Added .netrc support
- Added –tls-sni option
- Swaks is now available on CPAN as App::swaks
- Swaks will now print errors if deprecated functionality is used

Notable changes:
- Automatic file detection is deprecated. Previously, if an argument
  to –data, –body, –attach-body, and –attach resolved to an
  openable file, the contents of that file would be used as the actual
  argument. Now the proper way to do this is to place '@' in front
  of the argument to state explicitly that the argument contents are
  in a file.
- If any of the –xclient-* family of options (–xclient-name,
  –xclient-addr, etc) is provided more than once, only the last option
  provided will be used. See –xclient option if you need to simulate
  the previous behavior
- -g option is now deprecated
- Time::Local is no longer used and POSIX is now listed as a
  required module

Notable bugs fixed:
- Fix for subtle issue related to environment variable options. Affected
  error handling for options which required args.
- Fix issue preventing XCLIENT and STARTTLS from working together
  properly (#21)
- Fix issue which could cause generated date header to oscillate on the
  day of DST transition (#17, deb bug 955798)