Re: Google rejecting IPv6 mails
- Manuel Bieling:
> On 2013.10.07 13:23:59 +0200, Andreas Herrmann wrote:And here is the corrected example in one place. BTW it seems the
> > Hi there,
> > On 10/01/13 07:22, Dominik George wrote:
> > > Yes, I also face that issue and have forced IPv4 on known Google domains.
> > I also have those problems.
> > Is there an easy way in postfix the transport to some doamins just over
> > IPv4 and not IPv6?
> Wietse explained this a few weeks ago:
real fix is to set up one PTR record, with a matching AAAA record.
smtp-ipv4-only unix - - n - - smtp
smtp-ipv6-only unix - - n - - smtp
transport_maps = hash:/etc/postfix/transport
Execute "postmap hash:/etc/postfix/transport" and "postfix reload"
after changing the transport map or master.cf.
- On Sun, Oct 13, 2013 at 09:26:12PM +0200, Dominik George wrote:
> > There is, in fact, no reliable lsit of *all* mail hosts that willAmen. Along those lines, Postfix 2.11 will be the most important
> > ever (as in, for a long time in the future) be the sending MTAs
> > of Google-hosted domains.
> Apart from that, I am tired of implementing exceptions for each and
> every big proprietary mail provider out there. If a company desires
> to take part in federated e-mail communicaiton, I expect them to
> set up there stuff the way others expect it. If there setup is too
> huge to manage it without awkward tricks, like Google dynamically
> assigning roles to servers and not even reliably using subnets,
> whatever, for certain roles, then they are by definition not up to
> the task of operating it, be it for conceptional or personnel
> limitations. If we go ahead and teach all _other_ mail systems to
> fit their needs, we effectively do the work their customers pay
> them for.
> I am close to deciding not to opt-in to that and simply not
> accepting their mail if I can't using standard configurations.
minor version since the introduction of postscreen itself in 2.8. At
last we can have the benefits of postscreen zombie detection without
the pain of greylisting.
Gmail and just about every big proprietary mail provider out there
maintains lists of their hosts on dnswl.org. Postscreen with a
relatively simple DNSBL configuration, including a negative point
lookup for list.dnswl.org, will make this all very easy and low
maintenance. (Consider signing up for dnswl.org yourself; it costs
only a few minutes of your time.)
My postscreen page, not yet updated for 2.11:
http://rob0.nodns4.us/ -- system administration and consulting
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