You cannot modify MAPI messages trapped in a Simple Mail Transfer Protocol (SMTP) transport event sink, such as one that implements the ISMTPOnArrival::OnArrival method. Any modifications made to these messages seem to be successful, and show up in the scope of the event sink, but do not persist to the actual message.
Has anyone implemented the workaround? (force all incoming messages to be in SMTP format. To do this, install the event sink on a border server that is separate from your regular mailbox and gateway servers in your organization.)
If so, what was the performance hit and how difficult was it to do?
q
Has anyone implemented the workaround? (force all incoming messages to be in SMTP format. To do this, install the event sink on a border server that is separate from your regular mailbox and gateway servers in your organization.)
If so, what was the performance hit and how difficult was it to do?
q