Am 27.10.2010 18:28, schrieb Tyler J. Wagner: > Everyone, > > I've just joined the list, so please forgive me if this question has > been asked before. I couldn't find anything relevant in the last 3 > months of the archive. > > I run an ISP. We do not provide an SMTP server for our users; they use > various servers on the Internet. We want to transparently proxy all > traffic on 25/TCP to ASSP, and then have ASSP check and forward the > email on to the user's original SMTP server. > > Does anyone know of a way to do this? Well I can't answer your whole question - but I do know that some Swiss ISPs (most notably Swisscom) have started in spring 2010 to redirect all connections over Port 25 from their DSL networks to a central mail gateway where every non-authenticated traffic gets blocked. This is enabled by default and the ISP can disable the filter when the customer kindly asks. This way they encourage people to use 587 for submission. There were quite some people on the net (swiss bloggers) who critizized the way SC introduced traffic manipulation and how they communicated it (there was almost none). Some doubted whether they countermeasure would really have impact since people now are forced to use 587 for submission. Swisscom got also quite critizied by other members of the swiss network operators group (SwiNOG)
They are employing a Layer 4 redirection as far as they communicated. See: 1: First occurence: http://lists.swinog.ch/public/swinog/2010-March/004355.html 2: SC explains themselves: http://lists.swinog.ch/public/swinog/2010-March/004369.html And official communicaion: www.swisscom.ch/p25 - also in english So far - Mathieu ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Assp-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-user
