EFA and Office 365 hybrid
Posted: 18 Jul 2019 13:31
Hi All,
We are running an EFA MailScanner (MailScanner v1.2.7-dev running on EFA-3.0.2.6) that receives all our email and forwards it on to our internal Exchange (Hybrid) server, which in turn sends the email on to Office 365.
The problem is that Office 365 does it's own SPF checks when it receives the email and it always flags our EFA as the last sending server, so the SPF fails:
Received-SPF: SoftFail (protection.outlook.com: domain of transitioning *********.com discourages use of ?.?.?.? as permitted sender)
Where ?.?.?.? is our external IP and *********.com is the senders domain name
Anyone any idea how we stop this and allow O365's SPF to check the actual last sending server?
Thanks
Dave
We are running an EFA MailScanner (MailScanner v1.2.7-dev running on EFA-3.0.2.6) that receives all our email and forwards it on to our internal Exchange (Hybrid) server, which in turn sends the email on to Office 365.
The problem is that Office 365 does it's own SPF checks when it receives the email and it always flags our EFA as the last sending server, so the SPF fails:
Received-SPF: SoftFail (protection.outlook.com: domain of transitioning *********.com discourages use of ?.?.?.? as permitted sender)
Where ?.?.?.? is our external IP and *********.com is the senders domain name
Anyone any idea how we stop this and allow O365's SPF to check the actual last sending server?
Thanks
Dave