[PLUG] Mail UCE Filtering

Rich Shepard rshepard at appl-ecosys.com
Sat Oct 25 23:23:52 UTC 2014


   Spammers obfuscate the subject line to pass through postfix's
header_checks. Is there a way to identify such obfuscation while allowing
legitimate messages through?

   Here's an example subject line:

=?UTF-8?B?SW1wcm92ZSBZb3VyIFNleHVhbCBQZXJmb3JtYW5jZSBJbnN0YW50bHkuIDQ=?=

which alpine displays as plain text.

Rich






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