Block null "from" in logs

[John Rudd]

On Sep 30, 2005, at 7:37 AM, Matt Hampton wrote:

>> Anyone can help me to make a rule to block e-mails that comes with 
>> null from
>> in header (from=<> in mail.log).
>>
>
> If you are running sendmail and don't mind running milters you can use 
> milter-regex
>
> http://www.benzedrine.cx/milter-regex.html
>

And, if you use mimedefang, you can use the filter_sender function.

(not knocking milter-regex, just saying that this is yet another thing 
that mimedefang covers; so if you're going to do multiple things in 
milters, it might be prudent to use one milter that does all of those 
functions instead of multiple milters ... though, I honestly don't know 
which which is faster)

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