There's an issue about this at

I believe the problem is not that of the SPF, but the fact that mail gets sent using IPv6 from an address that has neither a name mapping to it nor a reverse pointer from IP address to name in DNS. See the second-first comment where R. David Murray states that "Mail is consistently sent from, always from the same IP address, resolves to", which clearly is false.

On 13 May 2015 at 08:20, Chris Angelico <> wrote:
On Wed, May 13, 2015 at 8:15 AM, David Wilson <> wrote:
> SPF only covers the envelope sender, so it should be possible to set
> that to something that validates with SPF, keep the RFC822 From: header
> as it is, and maybe(?) include a separate Sender: header matching the
> envelope address.

As Cameron says, Sender: isn't necessary - just have the envelope
address be bounces@ or something and it should be fine. This is how
SPF and (eg) mailing lists interact.


Antti Haapala