David Phillips wrote: > On Wed, 15 Sep 2004 05:01:08 -0500, Bryan Zimmer <baz at winternet.com> wrote: > >>I haven't run a serious mail server for a while, but during the SMTP >>exchange, doesn't the receiving MTA host validate the IP address of the >>sender? > > > http://homepages.tesco.net/~J.deBoynePollard/FGA/smtp-avoid-helo.html > Theory is all well and good, and often times these pages you link to have good theories. However, in practice HELO/EHLO restrictions are a good thing, in my opinion, because they work. On my home mail server, I've never had a problem with anybody not being able to send anybody in my house valid email because of HELO restrictions. On a smallish anti-spam relay server that processes mail for 4-5 small businesses, I reject over 2,000 potential spam messages every day. In the year or so the server's been running, I've not yet had a report valid mail not getting through because of it. I could either let all that crap in and then process it, or I could just assume that it's all junk and not let it in in the first place. So far, not letting it in has been ideal. -- jeremy _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota Help beta test TCLUG's potential new home: http://plone.mn-linux.org Got pictures for TCLUG? Beta test http://plone.mn-linux.org/gallery tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list