Downgrade to repoze.sendmail 4.1 due to a regression. See https://github.com/repoze/repoze.sendmail/issues/31
Downgrade to repoze.sendmail 4.1 due to a regression. See https://github.com/repoze/repoze.sendmail/issues/31

lorenzogil/yith-library-server,lorenzogil/yith-library-server,lorenzogil/yith-library-server