On 06/27/2010 10:06 AM, Craig White wrote:
On Sun, 2010-06-27 at 09:45 -0700, Daniel B. Thurman wrote:
> On 06/27/2010 07:56 AM, Genes MailLists wrote:
>
>> On 06/26/2010 07:57 PM, Daniel B. Thurman wrote:
>>
>>
>>
>>> THANKS! I have implemented the above recommendations
>>> as well as a few other advices in this posting.
>>>
>>> Thanks to all who participated - all very interesting to
>>> know how others have tackled the their spam issues.
>>>
>>> I will report how it all goes for me as I was getting at least
>>> 250 spam messages a day... it was getting on my nerves :/
>>>
>>>
>>>
>>>
>> I hope this helps for you ... for me these + careful access controls
>> works well.
>>
>>
>> A good access file, well managed is very helpful too ... for
>> blacklisting, for whitelisting, for 0s greet pause for known mx'ers etc.
>>
>>
>> Hope you cut down some of your spam .. :-)
>>
>> gene
>>
>>
> It's a bit early, but so far, I have received two spams... pretty
> good so far, but I will report back in a couple more days...
>
> I wanted to mention that there are some in this posting that
> are recommending greylisting... but have not said anything
> about how this is implemented into sendmail... so, what is
> your take on this?
>
----
you could actually do some research - information is easy to find
http://www.greylisting.org
Craig
Thanks for the tip! I will review greylisting.
On the
greylisting.org site, there seems to be a number of GL-milter
implementations for sendmail. Also, there is a GL-milter available
on Fedora... I wonder what the consensus is for which is, for the
best of, or more popular of GL-milter implementations.
In review of Evan Harris's whitepaper (2003), he seems to imply
(or point out) that whitelisting is not a good idea because if spammers
ever discover what is on your whitelist (how, I do not know), they could,
at least in theory bypass greylists.... Well, I need to review some more
to make sure I fully understand the pros and cons and the necessary
steps to make it work properly before attempting to do so. I am a
bit fuzzy still, as if a whitelist needs to be filled in, what exactly
should
go into it.... more research I guess...
I am not yet sure if what I have for now is sufficient for my tastes
(i.e. I am not yet using greylisting) and Spamhaus and "Gene's MailList"
seems to cut back a LOT of spams so far...
Interesting, though, & thanks again,
Dan