Ricardo, > I don't handle the mail servers - only the anti-spam/virus stuff. I've > been pushing for some time to get up-to-date and valid user listsings > autoupdated for some time, but it's been way to slow... The thing was > that allowing only valid users would basically provide verification of > valid email addresses. Since we forward the mail to the final mail > store servers, would milter help in this regard ? Ie, would the message > be denied since the destination server would rejected it as the user is > unkown ?
Don't know how that can be handled best in sendmail, I'm only aware of statical table of valir users. Likely there are other choices. With Postfix there are a couple of choices, like shared SQL or LDAP database of users accessible from all MX hosts, or if that is not possible, use of address verification probes, which query the next MTA if address is valid - this happens during original SMTP session and only if the answer is not yet in a cache. > I believe milter now is mature enough and allows the addition > of x-spam-status to the message, right ? You mean invoking amavisd-new through milter interface? I wouldn't recommend it, there are limitations in functionality and poor control on load, which can be fatal on an already heavily loaded system. > I think I can get funding to get new hardware. Looking at a couple of > Xeon Dual Core dual proc. boxes with more memory and 15K scsi disks. It is probably cheaper to get more of consumer grade boxes with SATA II disks then a single high-grade box. I wouldn't recommend this for MTA host, but I think it is perfectly acceptable for running amavisd-new + SA, as a loss of a host would not imply a loss of messages. SA is mostly CPU and memory hungry, somewhat slower disks don't matter that much. > That's been my major concern. I do need to look more into greylisting > though. Is this something possible on a sendmail-dual scenario or even > milter? Also, what about adding a milter to sendmail-rx - is this > possible ? You can attach milters to sendmail-rx, no problem. I'm sure there is a greylisting milter available, although I never bothered to look. Mark ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ AMaViS-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
