[opensuse] Fighting spam best practice
Hi I wondered if anyone here has a take on how to best setup a SUSE 10.1 server to fight incomming spam for 10-100 clients. We are situated in Norway so most english language mails are spam. Most articles I found on google are old and outdated. So I was wondering if anyone has something fresh... Especially on how to sort out mails based on english language... -- Regards Kenneth Aar
On 2006-09-19 22:50:57 +0200, Kenneth Aar, Grafikern.no wrote:
I wondered if anyone here has a take on how to best setup a SUSE 10.1 server to fight incomming spam for 10-100 clients. We are situated in Norway so most english language mails are spam. Most articles I found on google are old and outdated. So I was wondering if anyone has something fresh... Especially on how to sort out mails based on english language...
dspam works fine for me. you can find it in the buildservice. [1] sadly it is not yet as comfortable as it could be. i basically followed the /usr/share/doc/package/dspam/postfix.txt and inject mails via lmtp into dspam and reinject them via smtp into postfix. you can catch me on #opensuse-buildservice if you have any questions about it. darix [1] http://software.opensuse.org/download/server:/mail/ -- openSUSE - SUSE Linux is my linux openSUSE is good for you www.opensuse.org --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
white list practise is very good. So basically you firewall all what is not allowed/unknown. Another technology is to *require* people sending emails to you answer anti-spam question : such as picture recognition. Those two technologies combines leaves zero chance for virus/spam get to you. Even if virus attacks friend's computers and he starts spamming, all emails gets blocked, until he manually answers picture-recognition questions. Some Linuxoids go much more far than that, by implementing draconian measures; allowing ONLY plain text incoming email, all else is blocked. That is all images/flash/javascript/attachments or emails that include at least one component of those are blocked totally. HTMLs looks as text, is not rendered, so it's impossible to use browser weakness/hole in rendering engine.
Hello, Am Dienstag, 19. September 2006 22:50 schrieb Kenneth Aar, Grafikern.no:
I wondered if anyone here has a take on how to best setup a SUSE 10.1 server to fight incomming spam for 10-100 clients.
Well, SpamAssasin does a good job on spam filtering. I also recommend to include a virus check (for example clamav). The best way to do this is by using amavisd. But it's even better to block mails earlier by using blacklist services (to block open relays etc.), helo checks, blocking non-existing or invalid sender domains or hostnames (yes, spammers _are_ silly), ... - but this requires that you receive the mails directly (incoming SMTP). To make it short: You should give some more details about your environment: - how do you receive the mails (directly from other mailservers? fetchmail? ...?) - what exactly do you need? - how many domains, mailboxes and aliases do you expect? - how do you want to manage the mailusers? (text files, database, LDAP, ...)?
We are situated in Norway so most english language mails are spam. Most articles I found on google are old and outdated. So I was wondering if anyone has something fresh...
Very fresh: I just set up a server with postfix, courier-pop3, courier-imap, amavis, SpamAssasin, clamav, greylisting (sqlgrey), mailusers in MySQL database, postfix.admin for managing the mailusers, ... The problem with this: It's that fresh that it isn't documented yet ;-)
Especially on how to sort out mails based on english language...
I'm not sure if sorting out mails in english language is a good idea - it's a very common language and you will at least miss this mailinglist if you do so ;-)) Regards, Christian Boltz PS: If you understand German, I recommend to read "Das Postfix-Buch" - it was very helpful for setting up the mentioned server. (Sorry, I don't know english or Norwegian books about this topic ;-) -- The users sending twice are much more nasty. I guess you will not find a firmware update for them [Eberhard Moenkeberg in opensuse] --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (4)
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Alexey Eremenko -
Christian Boltz -
Kenneth Aar, Grafikern.no -
Marcus Rueckert