I want to block anything sent from onlinelifetime.com. I could use
BLACKLIST fromfile C:\iMail\Declude\blacklist.txt x 50 0
Or
BLOCKSENDER filter C:\IMail\Declude\BlockSender.txt x 0 0 ( BlockSender.txt: HEADERS 50 CONTAINS @onlinelifetime.com HEADERS 50 CONTAINS .onlinelifetime.com )
Either of those would work, although the first way is more efficient (since it just has to check the return address, rather than all the headers).
It seems to me the second way would work better, catching anything the first filter would catch, and anything sent through onlinelifetime servers, even if they change the reply-to address.
Correct.
Why would one use a blacklist fromfile instead of a headers filter file? Is there a performance or CPU difference?
Several reasons.
One is anti-spam programs typically have a "sender blacklist" in them, whereas they typically do not have filters. So people are more used to sender blacklists than filters. Another is that filtering is only available in Declude JunkMail Pro. Finally, there is the CPU issue, since filtering the headers is a bit more CPU intensive.
-Scott
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