On Mon, Nov 25, 2013 at 9:51 PM, Wietse Venema <wie...@porcupine.org> wrote:
> Mark Goodge: > > What would be the simplest method in Postfix of implementing an > > equivalent to the exim ACL mentioned in this blog post: > > > > http://blog.hinterlands.org/2013/10/unwanted-email-from-communicado-ltd/ > > > > That is, what's the simplest way of rejecting email from a list of > > domains contained within a simple text file that can be updated > > regularly without needing to restart Postfix. > > No need to restart Postfix. Use an indexed file and let smtpd(8) > auto-detect that the file has changed. > > Run this from cron: > > #!/bin/sh > > # Configure smtpd(8) to query $TYPE:real-file > > TYPE=cdb # or hash or lmdb > SUFF=cdb # or db or lmdb > URL=http://example.com/file.txt > > test -f old-file || touch old-file > wget -O new-file $URL && test -s new-file && { > cmp -s old-file new-file || { > postmap $TYPE:new-file && mv new-file.$SUFF real-file.$SUFF > mv new-file old-file > } > } > If I may chime in, I guess it's 'mv new-file.$SUFF real-file.$SUFF' that triggers the actual change that is actually detected by postfix (or more specifically, smptd(8))? -jf > > In particular, LMDB as of postfix-2.11-20131122 no longer restarts > a daemon and picks up changes immediately. With cdb and hash, the > changes are detected at the start of a new SMTP session and then > smtpd(8) restarts. > > Wietse >
