Security
 Table of Contents
Reject mail if sender has no MX record
When the client receives messages, the program will first check whether
the sender's e-mail address has an MX record on the DNS server. This means
that it will try to find out whether there is an e-mail server on the
Internet which downloads messages for that e-mail address.
This option can be useful in case PostCast Server is open for multiple
users and you want to deny access to the user who has intentionally or
by chance entered an invalid (nonexistent) e-mail address that identifies
him/her. This is often the case when somebody is sending Spam and is thus
trying to hide their identity.
Be careful with this option. In many cases, MX data for e-mail addresses
cannot be found on the DNS server. If so, you will prevent a user with
a valid e-mail address from accessing the server, which is not the purpose
of this option.
Allow access ONLY for users with these IP addresses
The program will allow access only to those users from the Internet
or LAN whose IP addresses have been entered. To add an IP address to the
list, click on the "Add" button. In case there are no IP addresses on
the list, the program will be available to all users depending on how
the "Host Name" option has been set.
You can specify an IP range in the security section of the program.
For example, '192.168' value will allow access only to those with an IP
address that starts with '192.168'.
Deny access for users with the following IP addresses
The program will allow access to all users except those whose IP addresses
are on the list.
Reject postings to following domains/e-mail
addresses
This is a list of e-mail addresses to which you do not want messages
to be sent by PostCast Server. The program will refuse to accept any message
sent to one of those addresses from the e-mail client. The program can
also block postings to specified domains. |