correct sendmail configuration
the `email_` prefix is wrong, the settings have no such prefix
Fixes: 6c902a4f1f484137ebccafe4d3390881fd0b3d61
correct sendmail configuration
the `email_` prefix is wrong, the settings have no such prefix
Fixes: 6c902a4f1f484137ebccafe4d3390881fd0b3d61