Hello!I'm curious as to what the norm is with Message-Id when sending mail from command line or scripts.
I notice mails sent by cron (CentOS 7) are all without Message-Id when they're passed to OpenSMTPD.
As I see cron should use sendmail.opensmtpd to send mail. Is it a problem with cron not supplying a Message-Id header? Thanks, Reio
