CSC Logo     Computer Service Centre
   
General I T Services
  MPI Home
General I.T. Services
  Helpdesk
 
 
 
 
 
 
 
 
 
 
 

Services for Students
Services for Staff

Search CSC
Contacts
About CSC
  Anti-Virus & Anti-Spam Mail System

 
Frequently Asked Questions
  How does the system identifies Spam?
  Can I stop receiving mail from specific senders?
  Can I prevent the system from scanning mail from specific senders?
  How to release mail from the spam quarantine server?
  How to access the safelist and the blocklist?
  How to add entries to the safelist?
  How to add entries to the blocklist?
   
 
 
How does the system identifies Spam?
  The system identifies spam mail in 2 different ways:
  1. Sender-based Reputation Filtering (Positive Spam)
 

Sender-based reputation filtering identifies the connecting IP address. It can block 75% spam messages as soon as it reaches the gateway. This increases the effectiveness of second layer content-based filtering. Emails identified by sender-based reputation filtering as spam are classified as Positive Spam.

 

When a positive spam is identified, either the connection between the sending computer and the gateway will be disconnected or an error message will be mailed to the sending computer.
In both cases, the gateway will not accept the emails.

  2. Content-based Filtering (Suspected Spam)
 

Content-based filtering is performed at the second layer. It includes thousands of sophisticated rules for checking the content and the characteristics of the message. It also can scan the latest "Image based" SPAM messages as well. Emails identified as spam by content-based filtering are classified as Suspected Spam.

 
  Can I stop receiving mail from specific senders?
  Yes. If you receive spam from a specific sender you can add that address to the blocklist. The blocklist identifies individual email addresses or domains whose messages you don't wish to receive. Thus, you may block some senders and prevent their emails from getting delivered to your inbox by adding their email addresses to your blocklist.
 
  Can I prevent the system from scanning mail from specific senders?
 

Yes. If you find that messages from specific senders are misclassified as spam, you may add those senders' email addresses to your safelist. The safelist identifies individual email addresses or domains that you trust and whose messages don't have to be examined. In this way, messages from those senders are not scanned by the system.

NOTE: The Safelist/Blocklist settings are contingent on other settings configured by the system administrator. A safelisted message may not be delivered to your inbox if it is determined to be virus-positive.

 
 

How to release mail from the spam quarantine server?

 

Login to your account in the following URL:

https://mailgate.ipm.edu.mo

To release a message from the IronPort Spam Quarantine, click the checkbox next to the message (or messages) and then select Release from the drop-down menu. If you are viewing the message in the Message Details page, simply select Release from the drop-down menu. The message is then released from the quarantine and delivered to your inbox.

 
 
  How to access the safelist and the blocklist?
 

To access the safelist and the blocklist, users must log into the IronPort Spam Quarantine (https://mailgate.ipm.edu.mo) even if they are accustomed to accessing their messages via the spam daily report (which usually doesn’t require authentication). Then, select the Options drop-down menu.

 
 
 
How to add entries to the safelist?
  Entries (individual email addresses or entire domains) can be added to both safelist and blocklist using the following formats:
 

. user@domain.com - individual email address

. server.domain.com - all email addresses from that domain

 

Users cannot add a sender or domain to both safe and block lists at the same time. However, if the user adds a domain to a safelist, and the email address for a user of that domain to the blocklist (or vice versa), the system applies both rules. For example, if the user adds example.com to the safelist, and adds george@example.com to the blocklist, the system delivers all mail from example.com without scanning for spam, but will treat mail from george@example.com as spam.

Users may explicitly block a specific domain using: server.domain.com. In this way, all email addresses/users from that domain will be blocked.

  Users can add senders to safelists in two ways:
 
Method 1
  1. From the IronPort Spam Quarantine, select the Options drop-down menu.

 
  2. Choose Safelist.
  3. From the Safelist dialog box, enter the email address or domain.
  4. Click Add to List.
 
 
Method 2
  Users can also add senders to the safelist if the message has been classified as Suspected Spam.
  1. From your email quarantine list, select the checkbox next to the message.
  2. Choose Release and Add to Safelist from the drop-down menu.
 
  3. Click the Submit button.
 

The envelope sender and the from header for the specified mail are both added to the safelist, and the released messages proceed directly to your inbox.

 
  Adding Entries to Blocklists
  End users can use blocklists to ensure that they never receive mail from specified senders. The methods are the same as for adding entries to the safelist.
   
  Should you have further questions, you may contact CSC by sending email to helpdesk@ipm.edu.mo or submit a service request online via SRMS.

Last updated: by Computer Service Centre.