I have been using Spamihilator for the last two years and can only say that this is the best free anti spam software that I ever used. And believe me, I tried a lot. Before i used the software I received approximately 500 spam mails per day, mainly due to published emails on websites that I own.
I searched desperately for a good anti spam software and tried many. Most did not work to well in reducing spam, some worked to well and even stopped my normal mail from arriving. Then, finally after a long evaluation time I found the spam software that I´am still using today. It reduced my daily spam dosis of 500 to 4 in just two days.
Spamihilator “sits” between your mail client and the pop3 server analysing every mail that arrives. If the program thinks a mail is actually spam it moves it to the trashcan and the training area. I suggest everyone takes a daily look into the trashcan just in case something gets missing the first days. You can also put emails on a whitelist which means emails from the sender of the whitelist will never be seen as spam and thus always arrive.
If there is a whitelist theres also a blacklist, you can enter emails that are always seen as spam and therefor automatically moved to the trashcan.
The training area helps to increase distinguishing chance of the spam software, you can select every mail and declare it as spam or not. Mailihilator then learns from these.
The amount of spam mails I received remained steady the same, but the amount that arrived at my mailbox was reduced by an astonishing 98% after just two days of using the spam program.
Spamihilator already has some good spam checking algorithm which gets better by using the training area but there are also lots of plugins which mostly serve a special spam type. Lets take a look at the most importanr plugins.
Addressee Filter: Quickly filters out mails that are not addressed To or Cc’d to one of your correct email addresses.
AlphabetSoup Filter 1.0: This plugin filters emails containing useless chains of characters.
Empty Mail Filter v1.0.2 : This filter blocks e-mails that are empty or contain very few words.
No Comment! Filter v1.0.0: This filter blocks e-mails that contain HTML comments. Spammers sometimes use HTML comments.
RFC-Validator 1.2.0: Filters mails that are not RFC conform or malicious
Scripts Filter v1.0.2: This filter blocks e-mails that contain embedded HTML scripts.
S_P_A_C_E Filter: Eliminates e-mails containing spaced-out words like `v 1.a g-r a` or `v.i c.0~d.i_n`.
There are lots more, all can be downloaded from the Mailinator homepage.
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How do spammers spam?
how does it compare to spamassassin?
To be honest, I have not used another spam program for the last two years. Spamihilator filters spam as good as a program can, I don´t see a reason to try out different ones if I already have a program thats really good.
Spamihilator would require me to use a Microsoft OS at home, which I wouldn’t do for any reason. It also only runs as a proxy in local userspace instead of on a server filtering multiple workstations. It’s a good little program but very limited in scope and ability.
SpamAssassin can run as a ’spam server’ filtering thousands of e-mail accounts or it can be installed as a windows proxy program like Spamihilator.
It really depends on what your trying to do and what level of comfort you have with letting the spam get to your local computer before you bother to filter it. Personally I run several servers at home one of which is a Slack box running SpamAssassin to filter pop3 and imap accounts.
As a previous user of Spamihilator I can say that its a pretty good program. I installed in on dozens of friends computers. But I had a bunch of issues with users that had a very high volume of e-mail. I went from using this to POPFile and while popfile is not 100% trouble free its much more reliable.