Re: Spamassassin not doing blacklist lookups
Robert S [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Don't know if this is of any help, but a lot of DNS tests seem to timeout: Think I've got it fixed. Changed settings in /etc/resolv.conf. Might give djbdns a go sometime. I think our broadband router is doing funny things with DNS. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
Adam Hardy wrote: [snip] sorry if this is a dumb question, but your email implies spam-assassin does DNS look-ups to filter out spam - which is not what I thought after giving spam assassin the once-over check-out. Is it so? What level of effectiveness does it have? And can it actually filter your pop3 server's inbox before download? I am using DNS and DCC checking here with spamassassin. Also with the rules du jour additions which update blacklist files a couple of times a week. The results after three months or so are 100% spam-catching and no false positives, though I did start out with a well-trained bayes db. The nice aspect of this is that I can now blackhole spam mail with a score of more than, say, 15 without having to worry about losing genuine mails. However, this is just on a home set-up with +/- 400 mails a day, mostly from mailing lists. Since each email has to be checked online, so to speak, things do slow down and if traffic on the net is heavy it can take up to around 5 seconds for SA to check each email. For only a few emails, this doesn't matter but if you had thousands it would be very hard, I imagine. Even so, this has provided the missing ingredient that's turned spam filtering from so-so to very good. I don't know the answer to your second question as I run exim4 as my own mailserver, so everything gets downloaded before handing off to SA. Doesn't sound very likely, though. :) Fish -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
Don't know if this is of any help, but a lot of DNS tests seem to timeout: debug: RBL: success for 9 of 17 queries debug: DNS: timeout for NO_DNS_FOR_FROM after 14 seconds debug: DNS: timeout for bsp-untrusted after 14 seconds debug: DNS: timeout for bsp-firsttrusted after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for rsl after 14 seconds debug: DNS: timeout for dsbl-notfirsthop after 14 seconds debug: DNS: timeout for rsl after 14 seconds A firewall problem? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
Robert S on 15/11/05 20:49, wrote: Don't know if this is of any help, but a lot of DNS tests seem to timeout: debug: RBL: success for 9 of 17 queries debug: DNS: timeout for NO_DNS_FOR_FROM after 14 seconds debug: DNS: timeout for bsp-untrusted after 14 seconds debug: DNS: timeout for bsp-firsttrusted after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for rsl after 14 seconds debug: DNS: timeout for dsbl-notfirsthop after 14 seconds debug: DNS: timeout for rsl after 14 seconds sorry if this is a dumb question, but your email implies spam-assassin does DNS look-ups to filter out spam - which is not what I thought after giving spam assassin the once-over check-out. Is it so? What level of effectiveness does it have? And can it actually filter your pop3 server's inbox before download? thanks Adam -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
pre-download filtering (was Re: Spamassassin not doing blacklist lookups)
On Wed, Nov 16, 2005 at 07:58:07PM +, Adam Hardy wrote: sorry if this is a dumb question, but your email implies spam-assassin does DNS look-ups to filter out spam - which is not what I thought after giving spam assassin the once-over check-out. Is it so? What level of effectiveness does it have? And can it actually filter your pop3 server's inbox before download? Not sure about spamassassin in general, but most static rule-based filters have some rules which are applied to the headers, and some which are applied to the body. Presumably, in order for there to be an advantage in filtering before download, you don't want the entire message fetched and scanned locally, so the filter must be operating on either just the headers, or a preset number of lines of body too[1]. So, the accuracy of such a filter would be entirely limited to those rules which were applicable to the headers only, say[2]. Is that really good enough? [1] I believe it would have to be a line-based cut-off, due to POP3 protocol restrictions. [2] These include many of the rules mentioned in this thread (RECV_IN_SOMERBL, SUBJECT_VIAGRA or whatever) -- Jon Dowland http://jon.dowland.name/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Spamassassin not doing blacklist lookups
I have installed the default installation of spamassassin on sarge. I have recently compared headers from a spam message that was filtered by my sarge installation (and missed as spam) with the same message filtered by a Gentoo server (that was correctly identified as spam, running a default spamassassin installation. Here are the headers: Sarge: X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on debian.X.net.au X-Spam-Level: * X-Spam-Status: No, score=1.7 required=5.0 tests=DRUGS_ERECTILE, RAZOR2_CF_RANGE_51_100,RAZOR2_CHECK autolearn=no version=3.0.3 Gentoo: X-Spam-Checker-Version: SpamAssassin 3.0.4-gr0 (2005-06-05) on .X.com.au X-Spam-Level: * X-Spam-Status: No, score=5.1 required=8.0 tests=DRUGS_ERECTILE, RAZOR2_CF_RANGE_51_100,RAZOR2_CHECK,RCVD_IN_BL_SPAMCOP_NET, RCVD_IN_NJABL_PROXY,URIBL_SBL autolearn=no version=3.0.4-gr0 As you can see, my Gentoo box has applied blacklist lookups, but my debian box has not. The local.cf and init.pre files are identical. How do I get my Sarge box to do these DNS lookups? Have I not installed something? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
How do I get my Sarge box to do these DNS lookups? Have I not installed something? Is this package installed? libnet-dns-perl Regards Mathias -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
Is this package installed? libnet-dns-perl Yes - it is installed: # apt-get install libnet-dns-perl -s Reading Package Lists... Done Building Dependency Tree... Done libnet-dns-perl is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Any other ideas? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Spamassassin not doing blacklist lookups
Don't know if this is of any help, but a lot of DNS tests seem to timeout: debug: RBL: success for 9 of 17 queries debug: DNS: timeout for NO_DNS_FOR_FROM after 14 seconds debug: DNS: timeout for bsp-untrusted after 14 seconds debug: DNS: timeout for bsp-firsttrusted after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for spamcop after 14 seconds debug: DNS: timeout for rsl after 14 seconds debug: DNS: timeout for dsbl-notfirsthop after 14 seconds debug: DNS: timeout for rsl after 14 seconds -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
