Date: Thu, 15 Jan 1998 10:19:56 -0800 (PST) From: Dan Busarow <dan@dpcsys.com> To: Font <font@Mcs.Net> Cc: questions@FreeBSD.ORG Subject: Re: MAIL FROM: address check commented out in /etc/mail additions? Message-ID: <Pine.UW2.3.95.980115101559.614D-100000@cedb> In-Reply-To: <Pine.BSF.3.95.980115000327.11673A-100000@Jupiter.Mcs.Net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 15 Jan 1998, Font wrote: > closer examination I found that a line in sendmail.cf.additions had been > commented out: > > # R<?> $* < @ $+ > $#error $: "451 Domain does not resolve" > > I was just curious as to whether this was intentional (what are the > disadvantages here? can some legit mail be rejected?) or just overlooked. Can't tell you why the line is commented out but I can say that since adding this our spam has gone *way* down. It catches several hundred a day. More than any of the other anti-spam checks. I haven't checked in some time but I did monitor the logs closely after installing it and only found one instance where it looked like a legitimate, but misconfigured mailer. I contacted the customer it was addressed to and asked if he knew how to get in touch with the apparent sender and my customer said "those guys have been spamming me" :) IOW, it really seems to work well. Dan -- Dan Busarow 714 443 4172 DPC Systems / Beach.Net dan@dpcsys.com Dana Point, California 83 09 EF 59 E0 11 89 B4 8D 09 DB FD E1 DD 0C 82
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.UW2.3.95.980115101559.614D-100000>