To add users, select add. GFI MailSecurity will automatically list all the 

users listed in Active Directory. If you do not have Active Directory, all 

known/imported SMTP addresses will be listed. 

You can then select to which users to apply the rule. Alternatively you 

can select the users to which the rule should not apply! You can also 

apply  the rule to one or  more mail enabled public folders. When you 

are  ready  specifying  to  which  users  the  rule  will  apply,  click  OK  to 

save the rule. 

Renaming the rule 

After you have created and saved the rule, you can rename it. To do 

this, simply right click on the rule and select `rename'. 

 Creating an attachment checking rule 

An  attachment  checking  rule  allows  you  to  block  attachments  of  a 

certain  type.  The  attachment  checking  rule  differs  from  the  content 

checking  rule  in  that  it  only  checks  for  a  type  of  attachment.  The 

content  checking  rule  checks  attachments  also,  but  only  for  words 

contained in them. 

If  running  in  Exchange  VSAPI  mode: 

Be  careful  when  applying 

attachment  rules!  Some  MAPI  applications  running  on  Exchange 

might be using vbs or exe files. You need to ensure that if this is the 

case, you don't apply rules to quarantine exe or vbs files to mailboxes 

used by those applications. 

To create an attachment checking rule: 

1.  Highlight  the  Attachment  checking  node  in  the  GFI  MailSecurity 

configuration. Right click and select New> Attachment checking rule. 

2.  A  new  rule  will  be  created  in  the  right  pane.  Double click  on  this 

rule. A tabbed dialog will appear. 

The attachment checking rule 

32 

 Configuring Content & Attachment checking