Hello,
is there a possibility to create something like a whistlist for outbound mails?
My mailflow is like the following:
internet <--> SMG1 <--> Exchange <--SMG2 <-- SAP servers
My SMG2 should accept all mails from my network and deliver all internal. But for external I need something like a whitelist. The "real" whitelist only works for inbound mails.
SMG2 is configured as outbound-acceptance-scanner and need to accept all the mails it receives from all my existing SAP servers (over 500 different systems). They all are allow to send mails to internal recipients (mailboxes within Exchange). But only 300 of them are also allowed to send mails to external recipients.
I already created a content filter rule which says: "If recipient isn't in list "Own Domain" delete the message and send notification". Now i want to create a whitelist like "If mail accepted from IP YX bypass content rule". Is there a way to manage it this way?
Creating policy group is no option. Not all the SAP servers are in my AD. Some of them are Linux servers. Also its not possible to create a list with sending email adresses. Some of them have multiple adresses. The only unique identifyers are the ip adress and/or the hostname.