96 Setting your antispam policy
Blocking by a custom blacklist
Blocking by a custom blacklist
You can configure Symantec Mail Security for SMTP to block email by a custom
blacklist (which contains the sender’s address or domain). It searches both the
envelope From and message From headers to determine string matches.
An exact address match triggers a block first. If the exact address is not found,
Symantec Mail Security for SMTP looks for the wildcard representation of the
domain. If the wildcard representation of the domain is not found, it looks for
the specific domain. If the specific domain is not found, Symantec Mail Security
for SMTP strips the first portion of the domain, and the remaining portion is
checked. This process continues until a match is found or until the entire
domain is parsed.
Domain names must begin with either @ or a period. You can use wildcard
characters in the user name portion of the address.
Note:
If you configure Symantec Mail Security for SMTP to block a subdomain
(server.company.com, for example), it blocks only that subdomain and not the
full domain (company.com, for example).
To block by a custom blacklist
1
On the Symantec Mail Security for SMTP administrative interface, in the
left pane, click
Anti-spam Policy
.
2
In the Custom Blacklist window, under Blocking by sender’s address, check
Identify messages from the following email addresses or domains as
violations (one per line)
.
3
In the text box, type the email addresses and domains to be blocked.
Use only one entry per line. Wildcard characters (* and ?) are allowed in the
user name portion of an address.
4
Under Do the following when a violation occurs, select one of the following:
■
Drop message
■
Log only
■
Forward message
5
If you selected Forward message, in the To email address box, type the email
address to which the message will be forwarded and in the Subject line box,
type the subject that will appear in the subject line of the forwarded
message.
6
Click
Save Changes
.
Summary of Contents for 11105111 - SYM MAIL SEC SMTP 5.0 SMS PORT MEDIA CD EN
Page 1: ...Symantec Mail Security for SMTP...
Page 8: ...8...
Page 44: ...44 Installing Symantec Mail Security for SMTP Uninstalling Symantec Mail Security for SMTP...
Page 88: ...88 Setting your antivirus policy Setting up your own LiveUpdate server...
Page 124: ...124 Setting your antispam policy Blocking by custom spam rules...
Page 140: ...140 Setting your filtering policy Blocking by custom content rules...
Page 170: ...170...
