Hello, Am Montag, 16. Mai 2005 22:25 schrieb Jure Koren:
On Monday 16 May 2005 01:57, Ariel Sabiguero Yawelak wrote: [methods against spam] using SPF (Sender Policy Framework), which, simply put, registers all sending MTAs for a given domain in that domain's DNS records, so you can trivially check if you're getting the message from a MTA that actually is authorized to send e-mail with return path from that domain. However, right now, there is a shadow of doubt over whether this will ever become a real standard that everyone will follow (of course, that would be beautiful).
I'm not sure if I really want SPF... I like to use one SMTP server for all my mail adresses - most are @cboltz.de (which is the server I use for sending mails), but I also have adresses @web.de and @nexgo.de. GMX already classifies my mails with From: ...@web.de as spam because I don't use the web.de SMTP server. Hey, cboltz.de is definitively not an open relay and has a static IP, so where's the problem? Additionally, I've seen statistics that spammers use SPF more often than "good" mail servers. (Sorry, I don't remember the URL.) So: Sorry, SPF won't make things better, only more difficult. Using Blacklists of open relays and dial-up IPs seems to be a more useful way. [greylisting]
The idea is quite simple: you temporarily reject *all* e-mail from every SMTP client you haven't spoken to in a while [...]
Greylisting sounds good, at least for blocking viruses. (Don't ask me if it really helps blocking spam, but I don't think so :-( Regards, Christian Boltz -- what does "> /dev/null" mean? and how do i reverse it? would "< /dev/null" be right? [aus comp.unix.shell]