The IPG mail server integrate a very strong and powerful Antispam engine. This filter, using Bayesian logica and others method of filtering, can stop approx. the 98% of the spam that all of us receive every day. Currently we maintain the filter in learning state so all the messages even the spam messages are delivered to the final mailbox, without blocking anything. Of course we want to activate the filter so all the spam is blocked, but because the filter is very strong, can happens that in some case it record as spam even Legitimate email messages. To prevent this, you have to teach the filter about the nature of the mail you received. The interaction with the Antispam filter is quite simple: every time you receive a message that the filter didn't correctly identify you have to forward the same message back to the filter. This way the filter can learn directly from you what is spam and what is not.

<note warning> If you want to receive all the messages without filtering (you are a spam lover technically speaking), inform the System Administrator, it can remove the filter for your mail address. </note>

In our configuration, the spam filter add just a string to the header of the message that normally isn't displayed, so in reality you can't see directly if the message is spam or not. For this reason every mail that is recognized as spam will be delivered to the SPAM folder already present in your mailbox.
You have to look in the folder SPAM if you received spam mail.

If you don't see the SPAM folder under your mailbox account you have to subscribe to the folder. Follow these instruction to do this (for Thunderbird):

If the filter made an error (it mismatched a message), connect to your IPG mailbox using the web interface http://ipgmail.epfl.ch, login and follow these guidelines:

• If the filter identified the message correctly (the spam message IS a spam message): don't do anything
• If the filter made and error: just forward the message as is to the address notspam@lth.epfl.ch
  1. Select the message and open it
  2. Click the link Forward as Attachment
  3. Insert the address notspam@lth.epfl.ch in the To: field (you can use also the pure notspam)
  4. Click the Send button

• If the filter identified the message correctly (the message is NOT a spam message): don't do anything
• If the filter made and error: just forward the message as is to the address spam@lth.epfl.ch
  1. Select the message and open it
  2. Click the link Forward as Attachment
  3. Insert the address spam@lth.epfl.ch in the To: field (you can use also the pure notspam)
  4. Click the Send button

<note important> The filter reconstruct his spam db only 2 times a day, so be patient if the interpretation of your messages seems wrong for a while. </note>