# # blacklist
APLawrence.com -  Resources for Unix and Linux Systems, Bloggers and the self-employed

2004/02/25 blacklist

I've removed advertising from most of this site and will eventually clean up the few pages where it remains.

While not terribly expensive to maintain, this does cost me something. If I don't get enough donations to cover that expense, I will be shutting the site down in early 2020.

If you found something useful today, please consider a small donation.

Some material is very old and may be incorrect today

© February 2004 Tony Lawrence

Spam control. The IP addresses of known spammers are added to blacklists and blocked from sending mail. People argue about the usefulness of this because these adresses change: new folks get addresses formerly used by spammers and are then blocked.

I think it's a dumb idea for a business to use blacklists. You don't want to block potential customers from sending you mail.

People do disagree on this; it's just my opinion.

Update: since then, blacklists are very common for controlling spam but continue to cause annoyance, mostly from false positives - you get put on a blacklist and therefore cannot send mail.

Kerio Connect Mailserver offers the ability to bump the spam rating score on blacklist hits. This doesn't block outright unless there are other indications of spam. That's a smarter way to handle these.

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Inexpensive and informative Apple related e-books:

Take Control of iCloud, Fifth Edition

Take Control of Numbers

Take Control of High Sierra

Photos: A Take Control Crash Course

Take Control of Upgrading to El Capitan

More Articles by © Tony Lawrence

I am starting to toy with the idea of denying all email by defualt, then using .procmail recipes for allowing "trusted" email addresses. The denied emails, would of course, go into some kind of holding area, where the user could then click on the email address, and make it acceptable. Everything else would be deleted after a specified period of time. This would really cut down on the spam. Has anyone else tried something like this?

- Bruce Garlock

I'm sure somebody has - I can't because too much of my business comes in by email from unknown people.



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