Re: [vps-mail] I Hate Spam! Time for an update.

["Bennett Lanford" <ben@xxxxxxxxxxxxx>]

On Tue, April 12, 2005 6:15 pm, Scott Wiersdorf said:
> On Tue, Apr 12, 2005 at 03:37:13PM -0600, Jonathan Duncan wrote:
>>
>> Brilliant!!  It sounds almost like a partial miracle cure.  Almost like
>> challenge response but without ever needing to bother anyone into
>> sending
>> a message twice.  Excellent!  Thank you!
>>
>> Just for good measure, has anyone had any problems having this milter is
>> production with end users?
>
> I have one user who has a correspondent that doesn't use a valid MTA
> to implement SMTP (some ultra-high volume mailing lists are this way).
> When milter-greylist was turned on, he was unable to get this weekly
> newsletter. I was able to whitelist the sender domain (you can also
> whitelist a domain on the box so that it will never greylist).

The end of the default greylist configuration file
(/usr/local/etc/mail/greylist.conf) lists some some mail servers that are
"broken" for greylisting. (You can add additional incoming servers that
you don't want to greylist.) I've always just used the default servers.

An early version of milter-greylist didn't include those servers. Most of
them are *big* e-mail domains like AOL and Yahoo (etc.) that have big
mail-server farms, with the servers "acting as one." I watched my logs a
year or so ago (when I first tried greylisting) as I sent an e-mail from a
Yahoo account to my VPS. Each time it tried to resend, it sent the mail
from a different server (in the pool of Yahoo servers). Finally, there was
a repeat server, and the mail got through. (It took about three hours,
IIRC.) (I hope I'm remembering the above correctly, and not spreading too
many lies.)

Occasionally I've had a user complain that an e-mail didn't arrive
instantaneously. When I tell them about greylisting, they generally think
it is a good idea. (I *love* it!!)

-- 
Bennett Lanford <ben@xxxxxxxxxxxxx>

There are 10 kinds of people: those that understand binary and those that
don't.
======================================================================
This is <vps-mail@xxxxxxxxxxxx>       <http://www.perlcode.org/lists/>
Before posting a question, please search the archives (see above URL).