There were a lot of changes made in 4.0 that may affect emails. I would start with number 18 in the Important notes section of the release notes. [URL] If that does not resolve the issue then you should review the lifecycle log and your mail server log to try to determine what exactly is failing.
Hi, We received new servers and I decided to create template in OpenManage from one of the R640 servers and then apply it to newly arrived servers. After that I updated all firmwares including iDRAC to version 4.00.00.00 and iDRAC stopped sending e-mail alerts.  If I downgrade FW to 3.36.36.36 - it works without any changes in settings.  Could you please advise what I should tune to start receiving e-mail alerts with FW 4.00.00.00 ? thank you.
iDRAC 4.00.00.00 doesn't send e-mails