timestamp spam filter1997-10-17 10:13:35What recipe would catch "bad timestamps?" "... a specific program that many spammers use has a bug that you can exploit in a filter. This program's forged headers use the timestamp of "-0600 (EST)". However, Jason notes that Eastern Standard Time is usually marked "-0500 (EST)" and Eastern Daylight Time is "-0400 (EDT)". Thus, filtering messages with the bad timestamp will catch either spam from this particular program or mail from incorrectly configured mail servers." --
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