Currently running 12.0.1 Symantec DLP.
SMTP Prevent running in forwarding mode - Approximately 1000 outbound email messages per hour pass through
Outbound Mailflow looks like this currently:
Exchange(Edge server) ---> DLP SMTP Prevent ---> MTA ---> ( CLOUD )
Exchange currently sends email directly to MTA .
When we place DLP SMTP Prevent inline and configure Exchange to hand off to DLP SMTP prevent we get a connection with the downstream MTA and it looks fine.Every thing working fine mails go outside.
Testing: When we stop SMTP (vounto monitor and vounto update ) service manually all mails stuck in queue.
We already set smart host to route mails to MTA cloud on second priority.
Is then any way to route mails from exchange to cloud MTA , when SMTP services down ie. no communication on port 25 but we are still able to ping smtp server ie. ICMP working?