I was wondering if any1 know a way to limit number of external recipients (to any number, lets say 50), so if someone try to send email to more then 50 users they get rejected with NDR or some notification.
Now, i know there are following options, but they are not good:
1. Recipients --> mailboxes --> <username> --> edit --> mailbox features --> mail flow --> and then to set Recipient limit since this will limit number of internal recipients as well...
2. Mail flow --> send connectors --> … Organization transport settings --> limit number of recipients.. this will limit number of internal recipietns as well..
3. Throttling policy..i have tried with this, but didnt find any good for this type of problem.
I have seen that there is option: PickupDirectoryMaxRecipientsPerMessage, (Set-TransportService Mailbox01 -PickupDirectoryMaxRecipientsPerMessage xxx), but im not shure if this is global or hwat...
Is there any other way, am i missing something?