Familie Van der Kooij: Services: Email filters

NEDERLANDS | ENGLISH

The following filters apply to all email traffic to the vanderkooij.org domain.

  1. The sender must use a valid domain.
  2. The sending server must have a proper name (FQDN).
  3. The following external blacklists are used:
    1. Trend Micro ERS (a paid service)
    2. all.rbl.jp (Suspect Japanese systems)
    3. bl.spamcop.net
    4. dnsbl.sorbs.net
    5. korea.services.net (Suspect Korean systems)
    6. list.dsbl.org
    7. zen.spamhaus.org
  4. The following internal blacklists are in use:
    1. blacklist: List of misbehaving senders like those using autoresponders on a mailinglist.
    2. dynamic blacklist
    3. dynamic networks 'Regular expression' list of networks that can not deliver directly but need to use their ISP mailserver.
    4. spamlist A list of much abused email addresses sampled from list send around by email. This is more a sample to get some idea of just how many recipients are use for a single message by stupid spammers.
    5. recipients List of much abuse local recipient addresses. Request for one of these addresses will not be accepted.

The filters listed above make sure a lot of messages do not need to be accepted. These list have a slight chance of blocking valid email but the risk is deemed acceptable.

If a message is accepted it will be inspected and checked for suspicious things like spam, maalware and such and may be marked as suspect or even put in quarantine.

Paid users will have access to the webfrontend that will show your messages and the exact actions taken on each of them. It will also allow users to reclassify messages as spam or ham (not spam) to increase the acuracy of the system.

The filtering is the responsibility of the abuse desk