On Thu, 14 Aug 1997, Remco van de Meent wrote: > On Thu, 14 Aug 1997, David Sewell wrote: > > : I think a Debian spam-blocking package, using TCPD and generalized > : to cover all MTAs, would be a good thing, with a couple of caveats. > > That's quite difficult to implement. > > One of the most important reasons: not all MTA are using > tcpserver/inetd/xinetd as their 'parent'. For example ZMailer and > Sendmail do create their own serversocket. (Yes I know, both of them > have options to make them spawned by inetd).
that's one of the reasons i prefer packet filtering to tcp-wrappers. block it out in the kernel before it gets to the application level. btw, sendmail can be compiled to use tcp wrappers. I think it's the -DTCP_WRAPPERS compile time option or something like that. > Another reason that you don't want to use (imho) tcpd as a spamfilter: I > like to 'filter' messages on more than just the other end's IP-address. > I know ZMailer supports additional blocking: > - source address (ip) > - HELO line > - MAIL line > - RCPT line > - existance of a valid DNS-entry in the several lines can any of the MTAs reject mail based on arbitrary headers? or even just the To: header (e.g. "To: [EMAIL PROTECTED]")? I know i can do this easily enough with procmail (in fact, I do), but IMO this is a job for the mail transfer agent, not the delivery agent. craig -- craig sanders networking consultant Available for casual or contract temporary autonomous zone system administration tasks. -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
