Mar 01 2019 09:08 AM
Hi,
we're using barracuda for inbound and outbound spam filtering, the issue we're having is that when we forward a calendar invite it doesn't go out via the outbound connector it tries to go out via office 365 default SMTP and therefore get's blocked, see bounce back message below.
Again this is ONLY happening on EXTERNAL FORWARDS of calendar invites how can I correct it?
I already open a ticket with Microsoft support and they simply didn't have an answer so they said that they can't help us because we're using the connector.
Any ideas?
TIA
Mar 01 2019 11:10 AM
The NDR message seems to be referring to some transport rule, have you run a message trace on O365 and looked at the details? It will show you which rule was triggered.
Mar 02 2019 08:24 PM