[Box-Admins] Who has access to gandi?
Tobias Pape
Das.Linux at gmx.de
Thu Jan 7 08:29:38 UTC 2016
Hi Levente,
Sorry, I had to copy this from the archive (http://lists.squeakfoundation.org/pipermail/box-admins/2016-January/002120.html)
because, as I said, I cannot get mail on my gmx account via the list.
> Hi Tobias,
>
> Only the SFC has access to the admin panel.
> But such record already exists:
> 42.104.246.173.in-addr.arpa. 3600 IN PTR xvm-104-42.ghst.net.
> And it points back to the IP as well:
> xvm-104-42.ghst.net. 1200 IN A 173.246.104.42
> So, unless the servers of gmx are misconfigured, such change shouldn't
> have any effect.
No, that won't work for two reasons.
First, Mailman (via qmail) names itself "box4.squeak.org"[1] in its HELO/EHLO
phase but the PTR-RR says, as you stated, "xvm-104-42.ghst.net".
This violates the SMTP RFC and hence we get blocked.
We _could_ make qmail advertise "xvm-104-42.ghst.net" but this does
not match our mx entries for squeakfoundation.org, and we would get blocked
because of that.
Second, GMX explicitly forbids "hoster-generated PTR-RR records"[2]:
The delivering email server must have a static IP address. Additionally,
it has to be configured correctly and needs to provide a valid HELO,
as well as MX, A, and PTR resource records (reverse DNS entry).
>>The PTR-RR in particular must not correspond to the preset generic
record of the host.<<
(emphasis mine)
So we have to change.
>
> What we could do is to set up a strict SPF record, because we don't want
> any other sources to be considered valid senders by othe mailservers.
> I'm thinking about something like "v=spf1 mx -all".
>
I did this already:
squeakfoundation.org. 86396 IN SPF "v=spf3 mx a ptr ip4:173.246.104.42/32 a:box4.squeakfoundation.org a:box4.squeak.org include:squeak.org ~all"
squeakfoundation.org. 86400 IN TXT "v=spf1 mx a ptr ip4:173.246.104.42/32 a:box4.squeakfoundation.org a:box4.squeak.org include:squeak.org ~all"
Also I just found a Slack message from November that says:
[22:57] craig @group: Bradley Kuhn from SFC says that box4 could disappear at any time if Gandi doesn't renew the donation, so we should get set up with Tony at Rackspace ASAP.
I don't know what that means in terms of effort or in terms of other service support,
but I can imagine that setting up mailman again will be quite laborious.
Best regards
-Tobias
[1]: that was "box4.squeakfoundation.org" until yesterday.
[2]: http://postmaster.gmx.com/en/email-policy/
> Levente
>
> On Thu, 7 Jan 2016, Tobias Pape wrote:
>
> > Hi all,
> >
> > who of the admins has access to the gandi control panel
> > for box4? we need to set the RR-PTR for box4 so that,
> > finally, GMX allows us to send mail again.
> > I'd suggest putting
> > box4.squeak.org
> > in there.
> >
> > Please reply directly, I cannot get ml-mail via GMX *grml*
> >
> > best regards
> > -Tobias
> >
>
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