Michal Čihař - Archive for Sept. 19, 2006

Blacklists consireder harmful

After my mailserver started to reject mails from servers where I want to accept mails, I decided to finally try to disable DNS blacklisting. Earlier I whitelisted some domains, but the list has grown too much.

I still use DNS blacklists as helping criterias for SpamAssasin, but being on blacklist is now not enough to reject legitimate mail. Let's see if spam amount in my mailbox will increase, but I doubt it will, other checks are also quite restrictive.

Spam in phone database

During regullar review of additions to phone database, I noticed that some people tried to add spam and links to their sites. I'm not going to add any further restrictions on database, but to make spammers life a bit harder, I added logging of IP addresses which I'm going to block if they attempt to add some links.

Fortuntely spam volume is htere low enogh to be still handled manualy.