Hi, Thanks. We do a lot of that already and I was just hoping I'd missed something in the access DB possibilities. I'm just looking at all possible options. Thanks. Jim -- Jim Howell Cornell University CIT Infrastructure, Unified Comm. Msging Group, Lead Email Specialist email: jwh2@xxxxxxxxxxx Phone: 607-255-9369 On 10/22/13 9:35 AM, "Jose-Marcio Martins da Cruz" <jose-marcio.martins@xxxxxxxx> wrote: >On 10/22/2013 03:11 PM, Jim Howell wrote: >> Hi, >> Thanks for the response. One question however. The "spammer@xxxxxxx" >> that is the envelope from, correct? We offer an authenticated server >>for >> people to use to send email via a fat client such as Thunderbird. The >> problem I'm trying to solve is to refuse their connection when they >> authenticate and not at the envelope from, aka earlier in the SMTP >> session. We unfortunately have too many people with compromised >> credentials using the service. Thanks. > >Don't know about your domain, but this equality isn't usually valid, and >you shouldn't reject >messages just based on this. > >There are other ways to solve your problem. On of them is to do rate >limits, based on connection >rate/message rate or recipient rate, to avoid spam being sent. Take a >look at : > > http://www.j-chkmail.org/wiki/doku.php/doc/howto/outgoing_spam > >the idea is there, using our filter, but you can implement it with others >if you prefer. > >To avoid accounts being compromised you can, e.g., reject outgoing >messages (with credentials) being >sent to some database of phishers reply adresses. Take a look at > > http://groups.google.com/group/anti-phishing-email-reply-discuss/topics > > > >-- > > Envoyé de ma machine à écrire. > --------------------------------------------------------------- > Spam : Classement statistique de messages électroniques - > Une approche pragmatique > Chez Amazon.fr : http://amzn.to/LEscRu ou http://bit.ly/SpamJM > --------------------------------------------------------------- > Jose Marcio MARTINS DA CRUZ http://www.j-chkmail.org > Ecole des Mines de Paris http://bit.ly/SpamJM > 60, bd Saint Michel 75272 - PARIS CEDEX 06 > mailto:Jose-Marcio.Martins@xxxxxxxxxxxxxxxxxx >
