PLANET CS-2001 - Manual (Page 444)

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Step 3. When
[email protected] receives an email from a yahoo account:
 If the mail is from [email protected], then
[email protected]
will receive it.
 If the mail is from another yahoo account, such as
[email protected], then it will be rated as a spam mail.
Step 4. When
[email protected] sends emails to both [email protected]
and [email protected] :

[email protected] will receive the emails from
[email protected] .
 Emails sent to
[email protected] will be rated as spam mail.
 Only
[email protected] will receive emails from
[email protected], whereas [email protected] receives none
as a result of emails sent to it are classified as spam.