Uh, that should be a 5xx error *before* DATA, during HELO. On Tue, Apr 15, 2008 at 7:35 AM, Kurt Buff <[EMAIL PROTECTED]> wrote: > If you come up with a good strategy for this, let me know. > > Not only are we getting hit with it, for several weeks now, but I've > seen lots of complaints from others on various lists. > > I think the only thing to do is encourage, as strongly as possible, > owners of broken mail systems to fix them. By this, I mean that they > should validate recipients, and not accept mail then bounce it. Mail > to invalid recipients should generate a 5xx error during DATA phase. > > If you're using spamassassin however, the vbounce plugin is supposed > to offer some mitigation for this. > > Kurt > > On Tue, Apr 15, 2008 at 6:51 AM, yoth <[EMAIL PROTECTED]> wrote: > > > > Hi all, > > > > We are having a pretty big problem with backscatter for one of our > clients. It seems that lately the spammers love spoofing their domain. We > are getting several complaints a week from users receiving large quantities > of NDRs because of this. > > > > I'm sure this must be a common problem for any company with a decent web > presence. We aren't using SPF records right now. I've read that often this > doesn't really help. Also, it will be a little hard to pull off when we > control the corporate network, but not the website where some email will be > generated. > > > > Has anyone gotten any suggestions or tricks for dealing with this. > Blocking/quarantining all NDRs seems like a bad idea also. > > > > Or maybe our spam gateway should be catching most of these? Lots of the > NDRs would contain the original message text, which is obviously spam. > > > > Any ideas? > > > > Bill > > ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ > > ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ > > > > ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ > ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ >
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