Question Good DNS black lists for mailserver

[petrosvw]

Hello,

Currently I'm trying to reduce spam even before the filter will look into it.
Using dnsbl for it seems a good option for me.
I did some research and came up with the following:

• zen.spamhaus.org
• spam.spamrats.com
• b.barracudacentral.org

These blacklists have a good reputation. But I'm still looking for better detection. I still receive around 40 -60messages (yes, the spamfilter finds them all and mark them as spam) a day.

Do you guy's have some good blacklists that don't block too much (false positives)?
And maybe other suggestions?

My settings list:

• DKIM, DMARC activated for incoming mail
• SPF checking mode is set to softfail
• DNSBL activated with the list above

Thanks in advance

 

[Kaspar]

In addition to the dnsbl's you already mentioned I also use:

• bl.spamcop.net
• psbl.surriel.com
• ix.dnsbl.manitu.net

In all honesty I haven't researched these lists thoroughly. But by trial and error I've end up with these dnsbl's and they seem to work fine so far. Still quite some spam is coming trough.

 

[petrosvw]

Thanks. I will take a look in these. My previous blacklist blocked too much. (XS4ALL, hotmail and more. So that's why I started this topic)

 

[Michiel Klaver]

MultiRBL.valli.org - Informations about all RBLs

All blacklists, whitelists and informational lists used by the multiple DNSBL/RBL lookup tool at MultiRBL.valli.org. Also the dead ones are registered.

multirbl.valli.org

 

[petrosvw]

@Micael not all blacklist do a proper job ;-) For example sorbs.net and UCEprotect are 2 providers with a high false positive rate

 

[petrosvw]

My current list:

• zen.spamhaus.org
• spam.spamrats.com
• b.barracudacentral.org
• xbl.spamhaus.org
• bl.spamcop.net
• psbl.surriel.com

 

[Kaspar]

Thanks. I will take a look in these. My previous blacklist blocked too much. (XS4ALL, hotmail and more. So that's why I started this topic)

Which lists did you use before that caused too many false positives?

 

[petrosvw]

Which lists did you use before that caused too many false positives?

In my previous list did sorbs block xs4all. So, i'm trying to findout wich blacklists other users use without having false positives

 

[Erick Nunes]

Hi, the two lists below are resulting in too many false positives, any alternatives?

xbl.spamhaus.org
zen.spamhaus.org

Thank you.

 

[arditi]

Hi, the two lists below are resulting in too many false positives, any alternatives?

xbl.spamhaus.org
zen.spamhaus.org

Thank you.

I use these:

• bl.spamcop.net
• bl.blocklist.de
• rbl.your-server.de

 

[stou]

I use these:

• bl.spamcop.net
• bl.blocklist.de
• rbl.your-server.de

bl.spamcop.net gives false positive on outlook365 these days..

 

[AndruseVel]

I've also noticed problems with these lists:
zen.spamhaus.org
bl.spamcop.net
I use these:
bl.spamcop.net
psbl.surriel.com

 

[Peter Debik]

The zen.spamhaus.org list doesn't only include bulk mail senders, but also websites that are known to contain malicious software. If such a site is on a shared IP address, there might be nothing wrong with the mail service on the sending ip, yet the ip is still blacklisted due to one (other) website containing malicious scripts.

 

[darnyant]

Hi, the two lists below are resulting in too many false positives, any alternatives?

 

[tramvainqueur]

On Question - Possible to use DNSBLs for moving identified email as spam to spam folder (not blocking)? I wrote a way how to use non-blocking DNSBLs (in spamassassin, so they are only moved to the spam folder). And you can change the spam score for example from spamhaus.org ... with this I avoid really many false positives as all false positives are emails in other languages (really bad that spamassassin with default configuration thinks that emails shall be only english but spanish is much more nicer ...). If the spam filter is not educated in a bad way (e.g.: useless emails from real subscriptions should not moved to the spam folder but simply deleted or better sigend out, else spam filter begins to filter ham as spam), it works really good (with several own domains and many addresses on the domains I get about 220 spams per day but the most appear in the spam folder until automatically deleted).

so @darnyat some lists with false positives are perhaps good enough if you adjust their score. And well, as mentioned on the site I linked first, a site has a list with 'dnsbl's and with statistics although the results can not be trust fully as some have produce some false sitives if emails hve a foreign language.

For beginners: I hope you have all configured that moved spams to spam folder are automatically learned.

 

[crazyalf]

¿Qué servidores DNSL recomendáis? Además de tener activado SpamAssassins... Yo tengo los siguientes pero aún me entra un poco de SPAM:
What DNSL servers do you recommend? In addition to having SpamAssassin activated... I have the following ones but I still get a bit of SPAM:

• psbl.surriel.com
• ix.dnsbl.manitu.net

Gracias / TY

 

[Raul A.]

It's important you don't use a public nameserver when checking against blacklists! Furthermore, move spam to the Spam folder from the mailbox settings.