Relaying e-mail to the outside of NAT

Need to masquerade the local origin name to make it looking as a qualified domain name:

Add to /etc/postfix/main.cf:


# Rewrite the From address in Postfix V2.2:
#smtp_generic_maps = hash:/etc/postfix/generic

# Rewrite the From address in Postfix V2.1
canonical_maps = hash:/etc/postfix/canonical

In file /etc/postfix/canonical, we specify the address re-writing:


@node18.rutgers.edu    @capone.rutgers.edu
@unisys18.rutgers.edu  @capone.rutgers.edu

Run command


postmap /etc/postfix/canonical

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