[Checkins] [zopefoundation/Zope] f09ece: - update zope.sendmail to prevent version conflicts

[Jens Vagelpohl]

  Branch: refs/heads/4.x
  Home:   https://github.com/zopefoundation/Zope
  Commit: f09ece7360ad4350fd9d1a2de6803cdc3097bc8b
      https://github.com/zopefoundation/Zope/commit/f09ece7360ad4350fd9d1a2de6803cdc3097bc8b
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2020-08-01 (Sat, 01 Aug 2020)

  Changed paths:
    M constraints.txt
    M requirements-full.txt
    M versions-prod.cfg

  Log Message:
  -----------
  - update zope.sendmail to prevent version conflicts