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Cndnsd Vrsn: 4 PM Thursday 11/11 ACS Room 123- Greylisting
The next meeting of the Front Range UNIX Users
Group (FRUUG) will be held at 4:00 P.M. on Thursday, November 11.
Barb Dijker will talk about her success at
Netrack using
greylisting
to reduce the amount of spam being accepted for her customers.
Greylisting takes advantage of the fact that most spam delivery engines
don't queue mail if it is not immediately deliverable.
When greylisting is integrated into a Mail Transfer Agent (MTA),
it gives the initial connection with an unknown server an
SMTP temporary failure notification. If that same server attempts
to re-try the mail delivery at a later time, the mail is accepted
and the server is added to a greylist.
The devil is in the details, and
Barb's talk on greylisting will give an overview of the
technique, how it is implemented,
and details of integrating it
with sendmail and other open-source MTAs.
She'll also show how it works with other spam-prevention tools like
Spam Assassin. Barb will relate how well it's been working
for her at Netrack, discuss some caveats to consider when
using it, as well as some open issues.
As long as Barb is talking about her favorite subject,
spam, she'll give a brief overview of
Sender Policy Framework,
or SPF, what it is, and what it isn't.
Barb Dijker has been fighting and analyzing spam for many years
as a consultant, and involved fighting spam for
Netrack, Inc., and
was a long-time board member of the
Colorado Internet Coop.
She has given talks
on spam around the globe and has served as an expert witness in a
legal case involving spam.
This meeting will be in room 123 of the CU Academic Computing
Center building at Arapahoe and Marine Streets in Boulder. Marine St intersects
Arapahoe at 38th St; the Computing Center is on the southwest corner.
At our last meeting, Geoff Baysinger of Sun Microsystems
talked about innovations in Sun's Java Desktop System,
and demonstrated some of its central administration
capabilities that allow administrators to manage
large numbers of desktops from a central location.
Announcements, presentation slides, and
writeups for past meetings are available in the FRUUG Meeting Archive.
www.fruug.org/mtgarchive/index.html.
We're in the process of setting up
a January meeting on home automation.
We have several new books from Addison Wesley this month,
and we're expecting to receive a chapter from their new
book on sendmail milters to pass out at this month's meeting.
In addition, O'Reilly is whisking us some anti-spam books
to arrive in time for the meeting. The new books we
have on hand at the moment are:
- C++ Without Fear,
from Addison Wesley
- Imperfect C++,
from Addison Wesley
- Moving to the Linux Business Desktop,
from Addison Wesley
- UNIX Shells, By Example,
from Addison Wesley
You may check out books using your business card as your
library card; you must be on the membership list to check books out. Books
are due at the meeting following the one in which they are checked out.
Remember that your FRUUG membership entitles you to discounts
on your book orders from both New Riders Publishing and O'Reilly &
Associates; refer to the FRUUG Web site for details.
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