Sends this to your admin?

https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/set-up-spf-in-office-365-to-help-prevent-spoofing?view=o365-worldwide

On Mon, Apr 4, 2022 at 1:26 PM Krista <[log in to unmask]> wrote:

> The admin tells me:
> "As to fix the SPF signature and alignment settings we will need to add
> all Microsoft production server IPs ( because this will keep changing ).
> And Microsoft will not make that list available to us."
>
> "It is going to multiple MTAs (Message transport agents). In this case it
> will start with the SMTP relay server which will forward the message to one
> or more of the Hybrid exchange servers before it is routed via a nated IP
> to Microsoft production servers where is will be inspected by EOP"
>
> On Mon, Apr 4, 2022 at 1:10 PM Sunil Chauhan <[log in to unmask]> wrote:
>
>> The server which talking to eop should be on the spf.
>>
>> If you listserv directly sending to eop, then the connecting up should be
>> on spf.  Or route via the mailrelay which I believe would be already on spf.
>>
>> On Mon, 4 Apr, 2022, 10:11 PM Krista, <[log in to unmask]> wrote:
>>
>>> Is this article still the most current on how to get ListServ to work
>>> with O365 and not have messages being sent go into Junk?
>>>
>>> https://www.lsoft.com/news/techtipLSV-issue3-2015.asp
>>>
>>> Our ListServ is running on Windows and is on the Intranet of our
>>> organization, which has switched to using O365 for email. We currently use
>>> an SMTP relay. Messages that go to external addresses are fine, as the
>>> ListServ's domain has an SPF record that contains the ESAs, but if a
>>> message comes From the organization's main domain, from O365 to the
>>> ListServ, and the subscribers have a mailbox on the org's main domain (in
>>> O365), the messages takes a direct route to the microsoft production server
>>> and EOP, so the SPF check fails, and ironically internal mail, going to the
>>> listserv, then sent back to internal mail, gets tossed into subscriber's
>>> junk folders.
>>>
>>> I'm not an exchange server engineer/Office 365 admin/engineer. I'm just
>>> going based on what our engineer is telling me.
>>>
>>> If anyone has more up to date suggestions on how to work with O365
>>> (cloud) from an internal ListServ, please let me know.
>>>
>>> Krista Landon
>>>
>>>
>>>
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