We especially recommend reading the part about SPF records because customers often list the wrong values in their SPF record, which can cause mail flow problems.
Scenario 1 I’m a new Office 365 customer, and all my users’ mailboxes are in Office 365.
You should provide the hostname of the ASG server that you are using as your preferred CASG service domain.
Routing all mails to a smarthost : A Send Connector must already have been created and configured correctly on the Hub Transport server.
I hope I can provide some clarity with this post, as well as walk you through how to implement SPF, DKIM, and DMARC.
Sender Policy Framework, or SPF, is the old man at the email authentication party.
Since there is a limit of 10 DNS lookups per SPF record, specifying an IP address or address range is preferable for long lists of outgoing mail servers.
You can thank three email security standards (and other initiatives) for the reduction in spam: SPF, DKIM, and DMARC. I was recently told a story about a CFO who was subject to a phishing attempt.In 2013, more than 100 billion business emails were sent and received each day.Just one in five of all emails sent in 2013 were legitimate, and 92% of all illegitimate emails included links to potentially malicious content.In order to change the port to 587 you will have to issue the following command in the Exchange Powershell Console: Set-Send Connector -identity "NAME OF CONNECTOR" -Port:587Restart the transport service.Routing all mails to a smarthost with Username Authentication: A Send Connector must already have been created and configured correctly on the Hub Transport server.Scenario 1 I plan to have Office 365 host all of my organization’s mailboxes.