> > Le 12/12/2010 19:23, Giampaolo Tomassoni a écrit : > > > I just got blocked by the AT&T's blacklist (in contacting > > > ab...@att.com, besides...), but I'm pretty sure my MX is not an open > > > relay or other kind of nifty thing.
> > $ host tomassoni.biz > > tomassoni.biz has address 62.149.201.242 > > tomassoni.biz has address 62.149.220.102 > > $ host 62.149.201.242 > > 242.201.149.62.in-addr.arpa domain name pointer > > host242-201-149-62.serverdedicati.aruba.it. > > > > $ host 62.149.220.102 > > 102.220.149.62.in-addr.arpa domain name pointer > > host102-220-149-62.serverdedicati.aruba.it. > > > > So both IPs use generic hostnames, which are a sign of "half configured" > > servers. > > Unfortunately the RDNS is not under my control. > > Which is a fact I share with a lot of people worldwide... > > think as the receiving side. when I see spam out of joe.spam.example, I > > blocklist spam.example (and possibly every IP and domain related to > > them). If I see spam coming from host1-2-364.serverdedicati.aruba.it, > > what will I blacklist? On 13.12.10 11:14, Giampaolo Tomassoni wrote: > I personally (and many serious blocklists) would block the single spamming > address. I would not call what's at&t doing a spam blocking. I'd rather call that "policy blocking" which means you need to have DNS records that clearly say the IPs are not dynamically assigned. The policy "we don't accept (unauthenticated) mail from dynamic hosts" is quite common and logical. > You may easily see that Aruba.it is a co-location provider, so you > may easily understand that different hosts from the same address bunch are > probably handled by different organizations, with different means and > purposes. > > To me, it is counter-productive to block the whole bunch. ask aruba.it to configure reverse records properly. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. BSE = Mad Cow Desease ... BSA = Mad Software Producents Desease
