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Old 14th May 2009, 16:17
maikcat maikcat is offline
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yes it will turn off local recipient check,

the reason i believe you need this is for avoiding spammers
to querie your mail server for valid users (they also use VRFY and EXPN commands as well).

the use of luser_relay is for creating a bucket ,so that your system
will never try to send back mail telling that the x mailbox doesnt exists,
the drawback of this approach is that if a valid user sends mail to one
of yours account but he mistyped his mail,he will never know that his
mail never reached the intended recipient, the advantage is that
your queue will never be full with postfix trying to send back notifications
to spammers (who will probably provided erroneous from: address..)

cheers,
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