John Gateley:
>
>
> On 6/13/19 10:22 AM, Wietse Venema wrote:
> > John Gateley:
> >> Is there any reason the software upgrade would cause this behavior?
> >> I can't think of one, but the timing is very coincidental.
> > There is no known problem with mail from Postfix ending up in
> > SPAM folders after a Postfix update. The problem is therefore
> > specific to something that you did or did not do.
> >
> > It would be helpful if you could specify the changes that you made
> > in the process of rebuilding your server. For example changing the
> > IP address, hostname, or DNS can already have a major effect. So
> > can changes to Postfix configurations.
> >
> > Wietse
> Thank you Wietse.
>
> I changed the SPF record at the same time: the SPF record has two IP
> addresses
> in it, the second for a backup host that is not in use at this time, and
> I changed
> that second IP address.
What about IPv6? If you fail to have proper PTR records then that
would explain why mail is treated differently.
Wietse
