On Mon, Feb 23, 2009 at 05:01:09PM CET, Santiago Romero <srom...@servicom2000.com> said: > > Hi. > > I have a secondary MX server with qmail that I'm migrating to postfix. > Currently, my qmail server checks RCPT TO addresses against a plain text > file that contains all the valid email accounts for some of the domains > that is making MX-backup for. That "plain-text" file is scp'ed from the > main server. > > As I'm migrating it to postfix, I wonder if it's possible to do the same > in postfix. > > To summarize it, currently I have 2 files called: > > valid_accounts.txt: a list of valid accounts in the primary MX. > domains_to_check_user.txt: Holds a list of domains. Server only checks > RCPT against valid_accounts.txt for the domains present in this file. > > When a new email arrives, if the destinatary domain is in > "domains_to_check_user.txt", then I check the RCPT TO against > "valid_accounts.txt" (and return NO SUCH USER or ACCEPT the email). > > If the domain is not in "domains_to_check_user.txt", I accept it (if it's > in qmail's rcpthosts's, of course). > > This way, I'm rejecting thousands of email messages directed to > non-existent accounts in our main domains and sent directly to our MX2 > server (as it cannot check if the account exists without this method). > > Is there any way of doing something similar in postfix (maintaining > domains and accounts in 2 different files would be nice)? > > Thanks a lot.
postfix does this through the "relay_recipient_maps". it checks for a relay domain, only if there are addresses for this domain in the maps. Note it is mapS, you can have several maps, eg. one per domain to check. -- Erwan
