Many thanks to Marius (private), Ed and Dave for answering my questions. Thanks to the others too for sharing with me their point of view.
If you have those spam coming from companies based in EU, I'm really interested to see some of them. Forward them to me in private. Thanks ! Best regards, Pierre Mengal > >We are really infested by spam, and this is becoming a > serious problem. > > >We can't spend so many time to sort real spam and and > customer emails. > >So sometimes, a customer email is put into quarantine, which > is a disaster. > > c/r breaks all kinds of mail, esp send-only servers like > travel reservations servers, financial servers, newsletters, > VERP, etc, > etc. While each user can whitelist his list of send-only > servers, the > user never knows when a desired server will get caught by > c/r. Some of these send-only servers will unsub the > subscriber after one 5xx reject. > > The problem of generating c/r msgs back to forged > [EMAIL PROTECTED] and forged [EMAIL PROTECTED] is significant. > > Finally, c/r doesn't scale well to all of internet. And > some purists say > c/r is cost shifting. The c/r service shifts the costs of > anti-spam to the > legit sender. Does c/r scale for a even single server > with 50K users? > > >We tested the challenge system of some customers, and this is the > >solution we need. > > A lot of companies have been winning their battles against > spam without c/r. I suggest you keep looking.
BEGIN:VCARD VERSION:2.1 N:Mengal;Pierre FN:Pierre Mengal ([EMAIL PROTECTED]) ORG:Active Up SPRL TEL;WORK;VOICE:+32- (0) 4 /338.40.08 TEL;WORK;FAX:+32- (0) 4 /338.24.55 ADR;WORK:;;Rue de Fraigneux 25;Boncelles;;4100;Belgium LABEL;WORK;ENCODING=QUOTED-PRINTABLE:Rue de Fraigneux 25=0D=0ABoncelles 4100=0D=0ABelgium URL;WORK:http://www.activeup.com EMAIL;PREF;INTERNET:[EMAIL PROTECTED] REV:20040223T120330Z END:VCARD
