It will allow postfix to reject mail for invalid addresses. Such mail will not even be queued by postfix and will end up stuck in the queue at the sender's MTA. If you don't use a local recipients map postfix will accept all email not already blocked by smtpd_XXX_restrictions, will eat up resources in your anti-spam/virus and dbmail setups and will create backscatter for invalid addresses.
There are no cons I am aware of. Just make damn sure local_recipients_map covers all valid addresses. Jim Douglas wrote: >> From: Paul J Stevens <[EMAIL PROTECTED]> >> Reply-To: DBMail mailinglist <dbmail@dbmail.org> >> To: DBMail mailinglist <dbmail@dbmail.org> >> Subject: Re: [Dbmail] (no subject) >> Date: Sun, 18 Feb 2007 23:27:23 +0100 >> >> >> Yes Jim, >> >> setting up a local_recipients_map is a *good* thing. >> >> >> Jim Douglas wrote: >> > I am a victim of massive amounts or email being rejected(that did not >> > originate from my server) and sent to a user that does not exist on my >> > server, which in turn gets forwarded to the admin email address. I >> want >> > to Reject Unknown Local Recipients with Postfix/DBMAIL. >> > >> > This is what's happening, >> > http://www.postfix.org/BACKSCATTER_README.html >> > >> > I have this setting in mail.cf, >> > mailbox_transport = dbmail-lmtp:localhost:24 >> > local_recipient_maps = mysql:/etc/postfix/sql-recipients.cf >> > >> > this is sql-recipients.cf, >> > user = dbmail >> > password = mypw >> > hosts = localhost >> > dbname = dbmail >> > table = dbmail_aliases >> > select_field = alias >> > where_field = alias >> > >> > And the postfix docs say, >> > >> > "If a local username or address is not listed in $local_recipient_maps, >> > then the Postfix SMTP server will reject the address with "User unknown >> > in local recipient table" >> > >> > http://www.postfix.org/LOCAL_RECIPIENT_README.html.. >> > >> > ...is this a dbmail config setting I need to change? >> > >> > Thanks, >> > Jim >> > >> > _________________________________________________________________ >> > Don�t miss your chance to WIN 10 hours of private jet travel from >> > Microsoft® Office Live >> > http://clk.atdmt.com/MRT/go/mcrssaub0540002499mrt/direct/01/ >> > >> > _______________________________________________ >> > DBmail mailing list >> > DBmail@dbmail.org >> > https://mailman.fastxs.nl/mailman/listinfo/dbmail >> > >> >> >> -- >> ________________________________________________________________ >> Paul Stevens paul at nfg.nl >> NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31 >> The Netherlands________________________________http://www.nfg.nl >> _______________________________________________ >> DBmail mailing list >> DBmail@dbmail.org >> https://mailman.fastxs.nl/mailman/listinfo/dbmail > > > Why? > > I have to weed through 500+ emals at this point and I'm trying to weight > the pros and cons. > > Jim > > _________________________________________________________________ > Don�t miss your chance to WIN 10 hours of private jet travel from > Microsoft® Office Live > http://clk.atdmt.com/MRT/go/mcrssaub0540002499mrt/direct/01/ > > _______________________________________________ > DBmail mailing list > DBmail@dbmail.org > https://mailman.fastxs.nl/mailman/listinfo/dbmail > -- ________________________________________________________________ Paul Stevens paul at nfg.nl NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31 The Netherlands________________________________http://www.nfg.nl _______________________________________________ DBmail mailing list DBmail@dbmail.org https://mailman.fastxs.nl/mailman/listinfo/dbmail
