What apache spamassassin is not apache spamassassin is not a program to delete spam, route spam and ham to separate mailboxes or folders, or send bounces when you receive spam. Configuration of spamassassin with mysql on debian wheezy. The methods spamassassin uses to classify whether email is spam are as follows. Sitewidebayessetup spamassassin apache software foundation. Store spamassassin bayes in sql iredmail documentations. Hi there, one of the email accounts on a server was taking up almost its full quota for no apparent reason. First of all, we need to maintain a separate spam database for each mail account. These tests are applied to email headers and content to classify email using advanced statistical methods. Looking for tips to improve your existing installation. This is the database that is used by the spamassassin self learning bayesian classifier to store the ham and spam tokens. Should the bayesian classifier use chisquared combining, instead of robinsongrahamstyle naive bayesian combining. If you are upgrading from a previous version of spamassassin you.
If it contains any other files that start with bayes or whatever other filename prefix you specified it can break the database locking mechanisms spamassassin uses. If spamassassin fails to identify a spam, teach it so it can do better next time. It uses a robust scoring framework and plugins to integrate a wide range of advanced heuristic and statistical analysis tests on email headers and body text including text analysis, bayesian filtering, dns blocklists, and collaborative filtering databases. This san have a high use, and sometimes some users bayes files are been corrupted. Using spamassassin with hmailserver v4 use this forum if you have installed hmailserver and want to ask a question related to a production release of hmailserver. And spamassassin manages it very fine of its own auto learning, auto clearance. I recently had a problem where my spamassassin install started thinking that a lot of spam messages were really ham nonspam. My sql bayes database contains data for users who no longer exist. Spamassassin bayes storage module for storing data in redis allinmemory database for high performance nodes. The best practice imho is to train spamassassin globally on a small corpus of ham and spam, and let autolearn do its job. Spamassassin filter customized per user with automatic spam. By default, there must be 200 ham messages and 200 spam messages learned before it will be used.
I run a postfix mailserver on centos, and am trying to enable spamassassin s bayes filter, but i seem to be missing something. There are many ways to train your bayes database, this is my shot at doing it. Sep 02, 2006 i moved the spamassassin global database to datamiscbayesdb that way it actually gets backed up more often then when it was in etcmail spamassassin which is the default location. Hi again, setting up this very interesting spamsnake. These particular messages all were regarding stock quotes and were pretty obviously spam just by looking at. It supports black and whitelist filtering and bayes. Slamming spam with spamassassin spamassassin and mta.
Spamassassin is a project of the apache software foundation asf and has been ported for windows by jam software. If you run the salearn command as root then youre manually training to the bayes database for root, not for the database being used by sa for postfix. Visit the downloads page to pick it up, and for more info. If ive handed 100 messages to salearn that have the phrase penis enlargement and told it that those are all spam. This tutorial is a republish of a tutorial already on this forum, but simplified for clarity. This is especially important if you run spamd for spam filtering under a separate user account, e.
The core distribution consists of command line tools to perform filtering along with mail spamassassin, a set of perl modules which allow spamassassin to be used in a wide range of. They check for a specific spam or ham sign but do not actually assign a score to leave it to the spamassassin admin if they want to use it or not to optimize their spam detection. I have a problem with spamassassin and the bayes database files. Read references section at the end of this article before asking questions. The package itself will install fine, but the bayesian filtering parts will not be used since sa can be run just fine without bayes. At first the increase in false negatives meaning spam not getting flagged as such wasnt all that bad, so i didnt think much of it. This means that sometimes we get really cool features that may or may not. Its aim is to install spamassassin and its service for running in connection with the default integration with hmailserver. I use one bayes database to all sites in my server. I am using the jam software spamassassin windows version and modified the salearn.
By continuing to use this site, you are consenting to our use of cookies. Since spamassassin autolearns, the bayes database files could increase perpetually until they fill your disk or you run out of memory. The bayesian classifier in spamassassin tries to identify spam by. I want the new amavisdnew server to become our new mail server but i dont want to lose all the bayes tokens of the old spamassassin server. If you only train your own bayes database using salearn, you will not be. Bayesnotworking spamassassin apache software foundation. The approach, to filter spam in spamassassin is more sophisticated than the simple keyword matching provided by most smtp antivirus software. Tests with such a score a generally used in third party rule sets. Create required sql database used to store bayes data. Spamassassin is an intelligent email filter which uses a diverse range of tests to identify unsolicited bulk email, more commonly known as spam.
The success of spamassassin relies on a well trained bayes database. What should be the minimum size of the bayes tokens database. Mailspamassassinconf spamassassin configuration file. Feb 11, 2020 unsupervised learning from spamassassin rules also called autolearning in spamassassin. Spamassassin for windows antispam components jam software. This happens if spamassassin finds rules with a score of zero. Apache spamassassin has won an infoworld best of open source software bossie award, as the winner in the antispam category for 2007.
So i am guessing the bayes database has been collecting the username i have been logging in with. Obviously, if you learn messages into one users database, the learning will not be used when scanning messages as a different user. Sent here because you received an email message which was modified by spamassassin. Id guess you ran spamassassin from the commandline as one user and hence one bayes database, but the user spamassassin runs as when actually delivering mail ie. All the usual things clearing out various imap folders, including sent mail and trash had little or no effect on the amount of disk space being used by the account, as there wasnt. Oct 26, 2016 the faq states running salearn user docker exec it which runs inside the docker container using root, hence the bayes database is built in the root. How to backupclearrestore a spamassassin bayes database. Bug resolved in debian stretch version by the time you next install spamassassin, this may have been resolved so you will just have to check the file to see if it has been fixed. Using a mta message transfer agent in combination with spamassassin for windows provides you a very effective antispam solution.
Usemysql, usepostgres, or usesqlite, then you will need to configure spamassassin to use that database before spamassassin will run. We need to create a sql database and necessary tables to store spamassassin bayes data. The bayesian classifier in spamassassin tries to identify spam by looking at what are called tokens. The will go in to sub directories out of the program directory c. How to export and import bayes database for spamassassin. It includes features such as optimization of scores asigned to rules, offline evaluation of filter, reduction of unuseful terms stored at bayes database and offline regex evaluation.
Spam increase due to spamassassin bayes database not. This in combination with other features results in very few false positives. Apache spamassassin is a computer program used for email spam filtering. Run spamassassin d lint and keep an eye out for a line like. Store and lookup spamassassin bayes in mysql hmailserver. The spamassassin bayes database has become ineffective on one of our servers and we want to wipe it and start fresh can anyone confirm how to do this on plesk 11. Spamassassin per user database configured but not used. Intro slide like most open source software, heck software in general, spamassassin has grown up over time. If you want then you can test spamassassin to make sure that it is using the new databases correctly. Install spamassassin for windows and spamd service.
The database will never be shrunk below this many entries. The other is to make sure autoexpiry runs for our bayesian database or it will grow very large very quickly. Bayes seems to take a long time on certain messages, or on accessing the database. I am not 100% sure, but i believe amavis is calling spamassassin using the amavis user, and therefore looking in the wrong location for the bayes db. Spamassassin for windows is based on the project of the apache software foundation asf and has been ported for windows by jam software.
Converting bayes data from a dbm database converting your bayes database data from berkeley dbm based storage. Spamassassin bootcamp salearn train bayes hmailserver. It is one of the most effective antispam solutions at all and uses a variety of mechanisms including text analysis, bayesian filtering as well as dns requests to block known spam senders. Migrating spamassassin from db files to mysql random. The program can be integrated with the mail server to automatically. Chisquared produces more extreme output results, but may be more resistant to changes in corpus size etc. These files, and users messages too, are stored in a external san. One is to switch the mysql tables over from myisam to innodb which will both improve stability and performance. Before switching over spamassassin to use the mysql database, there are a two more tuning operations we need to complete. Jam software sa some basic questions hmailserver forum. Nov 01, 2016 id guess you ran spamassassin from the commandline as one user and hence one bayes database, but the user spamassassin runs as when actually delivering mail ie. Header analysis spamassassin can analyze these headers of an email message and generate a score based on them. So i log in as that user and i do a ls a and this is the specific output for spamassassin. Click here for a variety of topics in our wiki that might help.
Sometimes you might have to work with the spamassin bayes token database. As long as you ensure that everything fed to bayes is accurately classified, manually verified, then you can only improve bayes accuracy by training it on everything. In, tell spamassassin where to find the bayesian database files. Whether you move the bayes database across or not or simply start it from scratch again is spoething only you can decide on as it will. Jul 03, 2019 as far as spamassassin config, most of it is in files under etc spamassassin, with some related amavis settings under etcamavis and a few settings for amavis, not spamassassin as ispconfig configures it stored in the database. Storing spamassassin user data in a sql database michael.
Apache spamassassin is a project of the apache software foundation asf. How to export and import bayes database for spamassassin to load balance the sendmail or other email servers, you may want to export the spamassassin database from your existing email server and import to the new email server, so that the new email server will have the bayes database for all the ham and spam right away. The directory also shouldnt contain any files other than your bayes database. Spamassassin has its own rules base, which is used to assign a score to each mail message. This tutorial will show you how to make a backup of that database. Clearing spamassassin bayes filter tokens systembash. By default, spamassassin comes configured to use berkeleydb useberkdb for its bayes database. Based on statistical analysis of the spamassassin success rates, we can automatically train the bayesian database with a certain degree of confidence that our training data is accurate. Spamassassin filter customized per user with automatic. Actually from my personal experience 99% of the users just suck at training a bayes filter properly.
Upon successfully syncing the database with the entries in the journal, the journal file is removed. The faq states running salearn user docker exec it which runs inside the docker container using root, hence the bayes database is built in the root. Storing spamassassin user data in a sql database michael parker start slide welcome, thanks for coming out today. Before posting, please read the troubleshooting guide. For approximately the past six weeks or so, ive noticed an uptick in the amount of spam getting through and delivered on my primary mail server. These files are binary so i cant compare them and i find no utility that actually tells me what database bayes is looking at. Bayes database howtoforge linux howtos and tutorials. Problem with spamassassin migration howtoforge linux.
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