|
Home >
Help Files >
Email >
Spam Filter
Spam Filter
[Spam Statistics]
[Server-side]
[Client-side]
[Documentation]
Statistics
Only available from .berkeley.edu domains.
Server #1 spam/virus stats
Server #2 spam/virus stats
Filters
Spam filtering can be divided into Server-Side and Client-Side filtering.
With server side filter, mail is already checked for spam as your mail is delivered.
Client-side filters work when you actually download/read your email message.
DECF uses several ways to block spam:
- Realtime Spam Block List to reject known spammers. Emails from known spammers are automatically rejected.
- No relaying allowed. Email not from a DECF user or sent to a DECF user is automatically rejected.
- Spam filter software through procmail. All email is now filtered
for spam. Potential spam messages are marked with the subject "[
SPAM? ]".
Beginning 8/24, all Spams tagged by CalMail are also tagged as SPAM on DECF
- Blocking of the following extensions: bat, cmd, com, cpl, hta,
pif, scr, vbs to cut down on spam/viruses.
Note that not all spam will be marked.
IMAP/WebMail Users
Instead of setting up a client-side filter, IMAP users can configure spam filter to automatically move all spam to a folder called Spam. You won't need to figure out how to setup filters on your mail client.
Note, you should periodially check and empty out your Spam folder, in case
certain email messages were marked as spam. Some message will
be marked as spam and some SPAM messages will pass through the
filter. Send an email to consult@newton.berkeley.edu if too many
regular messages are being marked as spam.
Requirements:
- You must be using IMAP to retrieve your email. See Mail Migration Instructions
- You cannot be using procmail already to filter your mail. This
tool is meant for the novice users who don't want to keep track of
spammers. Instead, we maintain the spammer list for you.
- If you want to add spammers to your list and then use your email clients
own filter. Eudora, Pine, Outlook, WebMail all have client-side filter features.
To use Spam Filter:
- Log into WebMail
- Click on Options->DECF Account Utilties->Filter Spam
- Check your Spam folder periodically in case legitimate email are sent there.
With your email client, you can filter messages that are marked with the
[ SPAM? ] subject line, or use your client's own spam filter to
filter out additional spam.
Filtering out [ SPAM? ] subjects
Since spam email is now marked as spam, users can set up Client-Side filters to move these email to another mailbox.
You basically want to set up a filter which will move all messages with the header "X-Spam-Status: Yes" to the "Spam" folder.
Setting up additional filters
There are many other ways to set up filters.
- Spam learning email clients
Eudora 6.0 and Netscape, among others, have a default spam learning feature. It will learn from the email messages which you mark as Spam and identify future messages as spam. Look in your email client's Options menu to turn this option on. Remember, you have to teach the filter what is spam and what isn't.
- Adding new spam filters
You can use the Filters feature of mail clients such as Eudora, Outlook, WebMail and filter out messages from certain senders. However, this doesn't really work over the long run as spammers usually spoof From email addresses. Another way is to set up Filters which contain spam words. See your email clients' help pages on how to set up filters.
|
