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...
the local_recipient_maps option in your set the local_recipient_maps = this will accept mail for whatever user (exist or not) combine it with...
you must have something inside main.cf like this: mynetworks = 192.168.1.0/24 <--your local net fallback_relay = mydestination = test.gr...
have you checked that your relay is not open? please post main.cf so that we can help you. cheers, maik
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