EFA and Office 365 hybrid

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dtravers
Posts: 3
Joined: 18 Jul 2019 13:12

EFA and Office 365 hybrid

Post by dtravers » 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

dtravers
Posts: 3
Joined: 18 Jul 2019 13:12

Re: EFA and Office 365 hybrid

Post by dtravers » 26 Jul 2019 16:04

Hi All,

Does anyone have any ideas on this please?

thanks

Dave

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shawniverson
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Location: Rushville, Indiana, USA
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Re: EFA and Office 365 hybrid

Post by shawniverson » 27 Jul 2019 11:31

I am not versed with O365, but there should be a way to tell O365 to ignore SPF from emails coming to your Exchange and trust it without performing those checks.

Alternatively, you may send to O365 and have it deliver to your Exchange so that it can pass SPF.
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dtravers
Posts: 3
Joined: 18 Jul 2019 13:12

Re: EFA and Office 365 hybrid

Post by dtravers » 29 Jul 2019 11:18

I was unaware that you can turn the SPF check off in O365.
Alternatively does the EFA support SRS (Sender Rewriting Scheme)?

jamerson
Posts: 130
Joined: 19 Aug 2017 18:57
Location: kaaskop

Re: EFA and Office 365 hybrid

Post by jamerson » 29 Jul 2019 15:25

make sure to add your EFA IP to office 365 server like this EFA will not be scanned.
we have this already set up in a production for one of our customer.
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