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spam is unsolicited e-mail usually sent to a large number of people that
usually tries to sell something or get people involved in some sort
of scam. As the Internet grows, so does the problem of spam. More
and more people are getting more of these spam e-mailings. For this
reason, the Lab is taking steps to reduce the amount of spam we receive.
The Lab's main email gateway is now running a version of sendmail
that includes various spam control features.
Further, our Lab email gateway uses the
Brightmail spam-protection service
to tag suspected spam.
sendmail anti-spam rules
The lab maintains a small set of server-side filters
to block long-term, high volume abusers of our system.
|Third Party Relay Blocking
A major contributing factor to the spam problem is the ability
for spammers to relay their e-mail through third party servers,
making it difficult to track it back to the originator.
This is called "third-party relay."
For more information on why we need to block this kind of relaying,
see this webpage entitled "What is Third-Party Mail Relay".
Therefore, the Lab does not permit "third-party relay."
Mail that comes into our server from outside the Lab
that is also addressed only to addresses outside the Lab is rejected.
|Sender Address Checking
A hallmark of spam is that the sender address (the "From:"
address) is often not valid, since spammers generally don't
want you to be able to respond to the message.
So, the sender address on all messages is now checked to make
sure it at least refers to a real computer on the Internet.
If you are an LBNL staff or guest, the spam reporting
procedure has changed as of 2003-02-19.
Please see our Brightmail anti-spam information
If you are NOT an LBNL staff or guest, please contact your
Internet service provider or local system administrator for further
Sometimes you may want not to get mail from certain people
although that person's email is not itself spam.
In such cases, we will not block the mail at lbl.gov
but rather encourage you to
use a Netscape Messenger filter to delete or refile any email
from the specific sender address.
Protect your e-mail address.
To reduce or prevent spam to your email address, try not to give out
your email address (via news postings for example) to anyone you don't
Don't Comply with Instructions in Spam Messages
Some spam messages include instructions for supposedly removing your
address from mailing lists, thus by all appearances stopping spam from
that spam source. However, if you follow the instructions, chances are
you are only making matters worse. Many if not most spammers use the
replies to confirm addresses and identities of people who will afterwards
receive even more spam. If you get spam, your best bet is to follow the
procedures described in this page.
- Note that spammers often send spam using blind-carbon-copies (bcc), a method to conceal the addressees by hiding the "To:" address.
For LBNL users ONLY: Use your lab-standard email address EPO@lbl.gov
Since LBNL lab-standard email addresses of the form EPO@lbl.gov are protected by the lab's spam-protection and virus-protection software, we recommend that you set your From: and Reply-To: addresses in your email client and any web pages to EPO@lbl.gov address if you have not already done so.
LBNL employees are urged to request a lab-standard email address (EPO) via see New Email Accounts, IMAP4 Mail, Directory, etc.
Unsolicited Commercial E-mail Research Six Month Report (good tips for reducing influx of spam)
For help in setting up a filter, please visit
our IMAP4 FAQ
Last modified Fri Apr 1 09:59:01 PST 2005