[Mailman-Users] IP blacklisted by at&t

Adam McGreggor adam-mailman at amyl.org.uk
Mon Jun 17 15:42:23 CEST 2013

On Mon, Jun 17, 2013 at 09:07:29AM -0400, Jason Fayre wrote:
> I've submitted the form that at&t tells you to in order to get your
> IP removed from the blacklist.  I then get a response back saying
> that the IP is not blacklisted.

Usually, there's a contact address to use here.

> However, I've got recent bounce
> messages saying we are.  If I try and telnet to at&t's mail servers
> from the mailman server, I get rejected because of a blacklisted Ip.
> The IP they are saying is blacklisted is the same one I submitted on
> there web form.
> Does anyone have any strategies in dealing with at&t?  I would
> love... god forbid... to actually talk to someone in their
> postmaster team about this.

Is that just on IPv4? In some cases, using IPv6 may work…

The short answer may be "their MXes, their rules"; finding someone
with a cluebat will often be the hardest part.

That does assume they've not outsourced the blacklisting side of
things, of course, when there's a further problem. It's probably worth
having a look at the reputation of the address block you're using;
https://grepular.com/projects/dnsblsearch.txt may be of interest/use.

> We host around 200 mailing lists for the National Federation of the
> Blind.  Some of the lists are fairly high traffic.

In a previous role, skipping email and using the telephone worked for
getting through to the right person/department.

Social media may work in your favo(u)r here… ask how you might get in
contact with postmaster@ via twitter/other channels. And perhaps use
your community's help, too.

(NANOG or MailOp may be better channels)

"There are two ways of constructing a software design. One way is to make
 it so simple that there are obviously no deficiencies and the other is to
 make it so complicated that there are no obvious deficiencies." 
    -- Hoare

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