KutuKupret

Simple Email Blacklist Using Spamassassin Plugin And RBLDNSD

leenoux — Fri, 19 Oct 2012 06:53:10 +0000

This is not new idea, actually. someone at spamassassin plugin developers have been made before. basically, the idea was put email addresses in RBLDNSD zone dnset format, ie: So, we replace @ sign into dot (.) sign. that way, we can save the email addresses into the RBLDNSD dnset zone. RBLDNSD part: create emailbl zone, [...]

Nginx As imap4/pop3 Proxy Using Apache As Auth Server Backend

leenoux — Fri, 31 Aug 2012 14:02:31 +0000

It’s been a long times since i wrote my last article, i’ve been bussy with real life things. As usual, I’ll get right to the subject of how to configure nginx as POP3/IMAP proxy server. nginx server configuration apache server configuration First, we create a custom log format in apache server, which is useful to [...]

Postfix Changing Outgoing IP By Time Interval Using TCP_TABLE And Perl

leenoux — Tue, 15 Nov 2011 09:00:44 +0000

Someone asked me if i can make a perl scripts that can change the ip address based on time interval, say he want ip address 1.2.3.4 used within one hour, if done next ip address will be used within next one hour..and so on. when it came to highest number of ip address in array, [...]

Postfix, Rate Limiting Inbound Emails Using SenderScore And Memcache

leenoux — Mon, 15 Aug 2011 03:13:34 +0000

I received email from someone fiew days ago, he directed me to an article about senderscore and and asked if I could make it usable. Actually, I’m not very familiar with how senderscore work. I’ve read the article and see the FAQ at https://senderscore.org/. I have found that senderscore can be queried with a format [...]

Postfix, Omar Kilani’s Memcache Patch Try-Out

leenoux — Tue, 09 Aug 2011 03:34:27 +0000

I was rewrote Omar Kilani’s memcache patch couple of weeks ago. But that was not tested due to lack of time and unavailability of servers that can be used. Now, i got chance to implement simple test. This is my configuration: main.cf memcache.cf Entry on memcache Query using postmap A little bit too verbose i [...]

Geo Location DNSBL Using Perl, Memcached And GeoIP

leenoux — Thu, 28 Jul 2011 07:17:14 +0000

In my last article about the DNSBL and memcached, I wrote how to use memcached to store the data for the DNSBL. It led me to other new ideas to make the Geo Location DNSBL. In previous article I put data into memcached with the following format: Example: Each ip address has a pair of [...]

DNSBL Using Perl And Memcached

leenoux — Wed, 27 Jul 2011 12:44:59 +0000

DNSBL is a DNS based blackhole list, which can be used as countermeasure against unsolicited mail spam. One of the most efficient ways to block mail spam is to do it on SMTP conversation stage by denying incoming connects from spam sources, where the source machine is identified by its IP address which is checked [...]

postfix, integrating memcache as a lookup table using tcp_table

leenoux — Wed, 20 Jul 2011 14:16:51 +0000

I have not had time to do the test “postfix memcached patch” because there are no idle servers that can be used for the experiment. instead, I’ve made a tutorial how to integrate memcached as a “postfix lookup table” with the help of tcp_table and a simple perl script. Indeed, tcp_table “table lookup protocol” is [...]

Postfix, old memcache lookup table patch

leenoux — Tue, 19 Jul 2011 03:58:23 +0000

Yesterday, I was idly fiddling with the old patch postfix “memcached lookup table” created by Omar Kilani . unfortunately, patches can only be used for old postfix distributions (2.1.x – Released 2005-04-01, 2.2.x – Released 2005-04-01). I rewrote the patch (code was not modified) so it can be applied against last postfix-2.9-20110706 snapshot. This patches [...]

Postfix, Dynamic OverQuota User Map Script Using Bash And Inotifywait

leenoux — Thu, 14 Jul 2011 13:47:59 +0000

I recently experimented with a simple bash script, inotifywait and smtpd_recipient_restrictions (check_recipient_access) to map email users who have exceeded the quota. Well, during testing, i’ve noticed when using hash/texthash lookup tables, it needed to be reloaded in order smtpd detect changes in table.so i’ve made quick test on mysql_tables it seem updating record on tables will [...]