1、/etc/postfix/main.cf
#設定允許relay的domain
relay_domains = test.com
#設定特定的domain要送到何處
transport_maps = hash:/etc/postfix/transport
#設定relay的domain中該收哪些信
relay_recipient_maps = hash:/etc/postfix/relay_maps
2、/etc/postfix/transport
test.com smtp:[1.2.3.4]:25
3、/etc/postfix/relay_maps
[email protected] AnyValue
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