You may see MessageSubmissionExceededException errors with OAB
Generation in 17004 events in the app log on the server holding the
generation system mailbox. This will only happen if you have a very
large OAB. By default the MaxSendSize is set to Unlimited for the OAB
generation system mailbox. This...
@CTI_Support - I'm in the same boat as you. We have an application that
show they are sending as TLS 1.0 and TLS 1.2. There's no details as to
what message are sent using what protocol. It's hard to find out why the
system delivers as either protocol. I even looked at the message trace
and found all...
@Jan Hajek Yes, SPF is required in all cases except where outbound mail
for your tenant goes through on-premises before heading to the Internet.
And in that case, you'll want to make sure you pay super close attention
to FAQ #6.