postfix and mail origin checks

[Karanbir Singh <mail-lists@xxxxxxxxx>]

hi,

Whats the 'robust' way to make sure email to a specific destination is 
only accepted if it came over the localhost:25 or /usr/sbin/sendmail 
route ? anything else should get a 5xx error. Emails to other 
destinations should remain unaffected.

Using postfix/c4. Had a look around, and header_checks might be one way 
to go.

-- 
Karanbir Singh : http://www.karan.org/  : 2522219@icq
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