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Re: [anti-spam-wg] Re: [anti-spam-wg@localhost] Verizon blocking all IP addresses delegated by RIPE?

  • To: Thor Kottelin <
  • From: Piet Beertema <
  • Date: Tue, 06 Dec 2005 13:08:03 +0100

> Date: Mon, 05 Dec 2005 16:01:11 -0800
> From: "MadGar" madgar@localhost
> Verizon is blocking email from a local high school email.  The email
> ends in  Thus, all email from the schools is returned to
> sender.

It is very common for email providers to use local and/or distributed
blocking lists. These are usually more or less dynamic.
It's also common to block e-mail that comes directly from hosts
on a DSL connection. This might be the problem with

# dig mx             60      IN      MX      10

# dig a      51      IN      A

# host

Right: a DSL customer. Perhaps they're sending outgoing mail
directly from this mailhost instead of via their ISP's mailhost.