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Questions tagged [rbl]

Real-time Blackhole is a database of IP addresses known to send spam, accessible over DNS, with specific responses to determine whether a host should be rejected or allowed.

A Domain Name System-based Blackhole List (DNSBL) or Real-time Blackhole List (RBL) is an effort to stop email spamming. It is a "blacklist" of locations on the Internet reputed to send email spam. The locations consist of IP addresses which are most often used to publish the addresses of computers or networks linked to spamming; most mail server software can be configured to reject or flag messages which have been sent from a site listed on one or more such lists. The term "Blackhole List" is sometimes interchanged with the term "blacklist" and "blocklist". https://en.wikipedia.org/wiki/DNSBL

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Losing headers from Relay server

Trying to troubleshoot spam filtering. I have a relay setup to accept all my incomming emails and filter them before it hits the main server. I cant seem to get spamassassin to put the headers in for score inside of…
ldrrp
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SpamAssassin stops RBL DNS-based tests after some time

I faced the problem with my email server: too much junk mail because of failing DNS RBL (SURBL, URIBL) tests. I prepared test message with SURBL test URL and checked it with "spamassassin" binary and it was marked properly. Then I restarted…
Alexander Gerasimov
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URIBL_BLOCKED on Ubuntu 14.04 Server with working Dnsmasq

I've set up a small mail server which includes Spam Assassin. Everything seems to work great except one. SA docs suggest installing a caching DNS server to keep some RBLs from blocking the server over too many calls. On Ubuntu 14.04 Server, Dnsmasq…
David Rahrer
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Exim - block incoming mail from blacklisted IPS only

I would like to check for blacklists only for incoming e-mail. I have users who usually get dynamic IP's which are blacklisted so they are not able to send the e-mail if I turn the blacklist option on. How could I achieve that ? Also, is there a…
Uzagorju
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Windows 2012 Essentials DNS problems querying certain RBLs

I'm running a mail server, Smartermail (SM) on Windows 2012 Essentials. The server is also doing DNS, but has no other roles. The DNS server is using the root hints and has no forwarders configured. As part of spam checks, SM is configured to…
pooter03
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Installed RBLDNSD for making a custom RBL but something is missing, could you help us?

We have successfully installed RBLDNSD with the idea of having a custom RBL server. Now we have started to make some testing adding some IPs to the our blacklist, and also have configured Exim (Cpanel based) email server to read the information from…
Alejandro Lengua Vega
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Evaluation of mail server configuration

I have a mail server configured to use DNS real-time blacklists (DNSRBLs), e.g. zen.spamhaus.org, to determine whether delivered email is spam or not. I would like to evaluate my mail server's configuration since I am still receiving A LOT of…
dimme
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Postfix - RBL check behind relayhost

We are running a mail server which is responsible for a sub-domain (say, dom1.example.com). All the mails sent from Internet are received through our relayhost (mail server responsible for example.com). I want to perform RBL/RHS checks in Postfix…
user1010
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SMTP / HELO and RBL black listing

We've been having many issues with our external IP address being put on RBL's and blacklisted. We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. Our internal domain name is XYZ.com (before my…
Travis
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How would I test rblserver?

I'm using few rbl servers, and all of the sudden i see slowness, as soon as I remove all rblservers, it works very fast as it used too, other than removing one by one server is there a way to test rbl server somehow?
alexus
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Why does mail, from some domain, sent through someisp.com, get blocked by the isp's webserver being listed in RBLs?

Today I one of our customers forwarded to me a mail from the ISP of one of her mail recipients that says they're blocking my customer's email because our webserver IP is listed in some RBLs. Of course the latter, being a webserver, has nothing to do…
Luke404
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How often do MXLogic lists get updated?

Some domain refused to accept email from my domain due to MXLogic filtering. I've sent an email to falsepositives@mxlogic.com and they responded promptly that they changed their records. Question: how long does it take for MXLogic subscriber to…
Oleg Mikheev
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What DNS Records / Zones are required for setting up a dnsbl server?

I'm trying to setup my own custom dnsbl server for blocking spam. I have successfully created a server running rbldnsd but am curious about what DNS records I would need to have in place so that my content filter can locate and communicate with the…
Mike B
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How to disable the default RBLs used by rspamd?

I'd like to use an RBL in rspamd without using all the preconfigured RBLs, but it seems that the configuration in /etc/rspamd/local.d/rbl.conf can only add new lists, not remove the default ones. The documentation also describes a way to disable…
allo
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what matters MTA's IP or hostname or both

There is no proper single article or I haven't researched properly, to find what does matters most for MTA's reputation IP or the hostname of the MTA or both matters equally. I am asking this question because I am facing a situation, where I am…
Anil Bind
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