Sendmail: How does one blacklist annoying spammers?
lists at sapience.com
Sun Jun 27 15:02:07 UTC 2010
DKIM signed emails:
Not directly anti-spam but very related.
Major outbound MX mail is generally signed by DKIM (or domainkeys).
While I am not yet making rejection decisions on sigatures that fail - I
do have my mail client color them green/red when a DKIM/DK sig is good/bad.
I also ensure my own domains sign all outbound mail with both DKIM and
DK (for yahoo!).
I use thunderbird and while its easy enough to set up I do with the
mail client folks would do this by default.
SO it is very easy for me to see in my mail client when I have a good
signed email from gmail or a fake one.
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