AMSAT takes a light touch in spam filtering for our e-mail alias service. Since we have no provision to hold messages for later human evaluation, only the most obvious spam messages are filtered out. Each forwarded message, however has an “X-Spam-Level” embedded in its header. The probability that a message is spam-like is reflected in the number of asterisks in this field. You may wish to set your e-mail client to delete all messages with 4 or more asterisks (****), move those with one or more asterisks to a spam folder that you review periodically, and let all the others through to your inbox. Check your e-mail client instructions to learn how set a Message Filter, Rule, Rules Wizard or something similar.

The following extract is from a recent message that passed through our server.

X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
X-Spam-Level: ***
X-Spam-Status: No, score=3.4 required=5.0 tests=BAYES_00,HTML_MESSAGE,

As seen in the X-Spam status line, “No” is the judgement that the mail server made, but the spam score was still pretty high at 3.4. Three asterisks were added to the X-Spam-Level line to make it easy for mail clients to filter as described above.

As ever, a compromise must be made, do you want to risk getting too much spam, or are you willing to tolerate some to ensure you don’t accidentally lose an important message?

73 de KM1P 29 AUG 2014