Hi all,
we are in the plans of implementing SPF record for our domains. Currently we have 10 accepted domains in our Exchange (domainA-domainJ).
Our mail route for Incoming is the following:
Internet-Spamfilter(3rd part provider)-ExchangeOnPrem-ExchangeOnline
Outgoing
ExchangeOnline-Internet
We have internal system that is also sending mail using relay of On-Prem Exchange
ExchangeonPrem-ExchangeOnline-Internet
We have also external system (outside corporate network)that is sending out mail using 3rd party system. It is sending using ourxx@domain.com as FROM address.
As far as I understand, our SPF record should look like this:
v=spf1 mx a ip4:222.222.211.211 a:server1.domain.com include:server2.domain.com include:spf.protection.outlook.com -all
Where 222.222.211.211 is external IP of our OnPrem Exchange server and server1/2.domain.com is external systems relaying.
Is it correct to use this record for all our accepted domains?
Thanks!
p.s.
Been trying to post this in Exchange Online forum, but no response yet since last week. So I'm trying here since reply is usually faster :)
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