Gmail provides SPF which describes valid outgoing IP addresses.
You can use 'dig' or 'host' commands to fetch SPF records like so:
$ host -ttxt gmail.com
gmail.com descriptive text "v=spf1 redirect=_spf.google.com"
$ host -ttxt _spf.google.com
_spf.google.com descriptive text "v=spf1 ip4:216.239
On Tue, 2008-11-25 at 20:06 +0100, Martin Toft wrote:
> On Tue, Nov 25, 2008 at 12:01:21PM -0700, Ken Gunderson wrote:
> > Assholes On Line publishes a list of their outgoing mta's so I can white
> > list them, but I've found no such list for gmail's outgoing mta's.
> >
> > How are the rest of y'
Ken wrote:
> We use spamd grey listing to combat spam. Works great. Gmail's mail
> servers pose a problem, however, in that they requeue mail from
> different mta's, resulting in subsequent delivery attempts coming from
> many different IP addresses, wh/eventually time out and get blacklisted.
M
On Tue, Nov 25, 2008 at 12:01:21PM -0700, Ken Gunderson wrote:
> Assholes On Line publishes a list of their outgoing mta's so I can white
> list them, but I've found no such list for gmail's outgoing mta's.
>
> How are the rest of y'all dealing with such situations?
Try
$ host -t txt _spf.goog
Hello:
We use spamd grey listing to combat spam. Works great. Gmail's mail
servers pose a problem, however, in that they requeue mail from
different mta's, resulting in subsequent delivery attempts coming from
many different IP addresses, wh/eventually time out and get blacklisted,
e.g.:
GREY|2
