Fails on windows: pypiwin32 outdated fork is used.

[jensens]

For some reason the windows related dependency pypiwin32 - an outdated fork of pywin32 - fails to install in Plone's buildout.coredev.

Installing instance.
While:
  Installing instance.
  Getting distribution for 'pypiwin32'.
Error: Picked: pypiwin32 = 223
Write to Town Square

It seems reason of the fork and its usage was a stalled project. It seems the pywin32 project is now maintained again. There are newer releases and commits.

I propose to use the main project again. We will try if usage of the main project release fixes our problem and in case it works we will prepare a PR.

cc @nilshofer

[jensens]

pywin32 fails with the same error. Reason is, it can not be installed by zc.buildout. If we install it before buildout using pip all works fine.

So yes, we should switch back to pywin32, this is a side effect of this findings. We will add it to with an environment marker to buildout.coredev like so:

pywin32; platform_system == "Windows"

So. we will prepare a PR, where we switch to pywin32 and additional add a section to https://github.com/zopefoundation/zope.sendmail/blob/master/docs/usage.rst with hints for installation on Windows.