Often i’m asked why idrac/vpro is not accessible from OS on the same computer?. When you share one NIC between OS NIC and idrac/vpro management card (for example on Dell optiplex you have only one NIC with enabled vpro and at the same time use this NIC for windows server) you usually cannot even ping from windows server own vpro/idrac interface. So for Dell PE servers it’s better if you assign for idrac interface own dedicated port. As for vpro you can only add extra NIC for OS usage and use builtin NIC only for vPro.
So if you have configured your Dell PE idrac to send by email all hardware alerts don’t use LOM sharing for idrac and don’t install smtp server on this NIC.