Date: Sat, 6 Sep 1997 17:39:53 -0700 From: John-Mark Gurney <gurney_j@efn.org> To: The Classiest Man Alive <ksmm@cybercom.net> Cc: hackers@FreeBSD.ORG Subject: Re: A quick note to those without DNS resolvable mail hosts. Message-ID: <19970906173953.45177@hydrogen.nike.efn.org> In-Reply-To: <3.0.3.32.19970906103209.009d3320@cybercom.net>; from The Classiest Man Alive on Sat, Sep 06, 1997 at 10:32:09AM -0400 References: <26041.873509860@time.cdrom.com> <26041.873509860@time.cdrom.com> <3.0.3.32.19970906103209.009d3320@cybercom.net>
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The Classiest Man Alive scribbled this message on Sep 6: well.. after a little research into sendmail.. I found that adding a few lines like: FEATURE(masquerade_envelope)dnl FEATURE(genericstable)dnl GENERICS_DOMAIN(your.domain.name)dnl then create a file /etc/genericstable with entries like: username realname@real.domain.name do this for all users that sendmail from the system.. then you will never have a problem.. (make sure you build the hash table if you don't have "define(`confAUTO_REBUILD', `True')dnl" in your mc file... this will make sure the sendmail when it prepares the envelope for your message.. it will convert the local username to the one in the genericstable file.. so the remote side won't see you false domain unless you don't have an entry for that person... this will also cause cc's to the local machine get converted so the outside world will be able to reply to 'em properly... enjoy... > At 11:23 AM 9/6/97 +0930, Greg Lehey wrote: > >On Fri, Sep 05, 1997 at 06:37:40PM -0700, Jordan K. Hubbard wrote: > >> Reply-to: postmaster@freebsd.org > >> > >> In order to combat the absolute flood of spam which has been coming > >> into my mailbox lately, I've gone to more aggressive sendmail filtering > >> > >> ... > >> > >> If you're sending mail from a machine with no valid DNS entry then I > >> have another one word answer for you: Don't. By doing so, you're only > > > >I do see one big problem, > >though: FreeBSD-questions. A lot of the people out there either are > >complete newcomers to FreeBSD, or they lack the experience and > >understanding to comply with the new requirements. A lot of them are > >AOL. By implementing these measures, you may not kill -questions, but > >you'd certainly significantly reduce (maybe by up to half) the volume, > >and you would do even more harm to people who are interested and are > >just looking in. > > I agree with this point. Will users get some explanation of why their mail > was bounced, or will it just float off into nullspace? And what of users > who are subscribed to the list? Will they suddenly be able to receive mail > from the list but not send to it? How do you even unsubscribe in that case? > > I read my e-mail on Windows, so I don't know from MX records and bogus > usernames. I filled out a rather simple set of forms in Eudora and dialed > my ISP; not a lot of room for such extensive filtering. I'm not even sure > what my domain name is after it gets through my ISP. I like to stay on > lists like hackers because it lets me learn by eavesdropping on more > knowledgable users. (Not to mention the occasional amusement value.) I > hope that the effort to block spammers doesn't hurt too many of us > legitimate but less-knowledgable users as well. > > K.S. -- John-Mark Gurney Modem/FAX: +1 541 683 6954 Cu Networking Live in Peace, destroy Micro$oft, support free software, run FreeBSD
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