Hi,
> > This problem has apparently been all over the internet for years, so I
> > don't think it's an unintentional bug by Microsoft.
> > https://answers.microsoft.com/en-us/msoffice/forum/all/routing-to-exchange-online-results-in-spf-softfail/367e14ac-a3ce-46a2-8949-ffbc8f66edc7
>
> If you're th
On Fri, Feb 04, 2022 at 08:16:49PM -0500, Alex wrote:
> > Unless you're "google.com", or "google.com" lists your IPs in its SPF
> > records, SPF is *supposed* to fail. This is why DKIM was invented, it
> > survives simple verbatim forwarding.
>
> So signing my message as it leaves my server is t
Hi,
> > I have a multi-instance postfix config and am trying to figure out why
> > Microsoft 365 is marking my email from the outbound instance as SPF
> > softfail.
>
> Because you're forwarding email received from an external domain,
> and it is *that* (envelope sender) domain's SPF records that
On Fri, Feb 04, 2022 at 02:34:35PM -0500, Alex wrote:
> I have a multi-instance postfix config and am trying to figure out why
> Microsoft 365 is marking my email from the outbound instance as SPF
> softfail.
Because you're forwarding email received from an external domain,
and it is *that* (enve
On Friday, February 4, 2022 3:14:29 PM EST Wietse Venema wrote:
> Alex:
> > Hi,
> > I have a multi-instance postfix config and am trying to figure out why
> > Microsoft 365 is marking my email from the outbound instance as SPF
> > softfail.
> >
> > I am trying to send mail from my gmail account to
Alex:
> Hi,
> I have a multi-instance postfix config and am trying to figure out why
> Microsoft 365 is marking my email from the outbound instance as SPF
> softfail.
>
> I am trying to send mail from my gmail account to the multi-instance
> postfix system through to my Microsoft 365 account, wher
