On 11 Jul 2016, at 17:36, Rick Romero rick@havokmon.com wrote:
Quoting "William L. Thomson Jr." wlt-ml@o-sinc.com:
You are not alone!
On Wednesday, July 06, 2016 01:15:34 PM Remko Lodder wrote:
Dear list,
I have setup a master-master replication setup. My primairy MX's send email over on a DNS loadbalanced way, so DNS is doing some kind of round-robin way of sending mail to both master servers.
I found out, that on one of the two machines, the email synchronisation is heavily delayed. Lets assume server A receives a mail from the MX; it synchronises almost instantly with the other server.
Whenever server B receives the email, it could take up to several hours to synchronise the email, it seems that it is not detected prior.
I have been dealing with this for months. http://www.dovecot.org/list/dovecot/2016-March/103680.html
For a band aid I use this crontab entry. On the 2nd mail server.
*/15 * * * * root /usr/bin/doveadm sync -u "*" remote:mail1 <snip>
Are you guys using LMTP to deliver from your MX server to the mailbox server?
Local delivery on the destination server is LMTP but the transport between MX and destination server is just plain SMTP.
I could try and revert to dovecot-lda and see what that does?
Cheers remko
I have a similar setup, but not yet synched, because as I understand it - using 'deliver' to drop mail into an NFS mount won't inititate a sync. I have to migrate my procmail scripts to sieve (and use the execute plugin) and change my final delivery to be a redirect to LMTP. Not sure how replication will work when running old procmail scripts from sieve...
In any case.. If you're piping to dovecot's deliver/dovecot-lda, here is a rudimentary LMTP script I hacked together that I planned to use to replace deliver with... I'd grab the 'master' mailbox server IP for each user for the command line.
#!/usr/bin/perl
use Net::LMTP; use Getopt::Std;
$opts{'s'} = "localhost"; $opts{'p'} = "24"; $opts{'f'} = 'root@' .
hostname; chomp($opts{'f'}); chomp($opts{'s'}); getopts("hs:p:f:u:", \%opts);if ($opts{'h'}) { print " lmtpsend [-s lmtpserver] [-f fromaddress] [-u subject] toaddress [...]
lmtpsend will send an email from the commandline.
Options: -s lmtpserver Sets the lmtpserver for where to send the mail through. -f fromaddress Sets the email address to be used on the From: line. -u subject Sets the email subject to be used from the Subject line. toaddress Where you want the email sent to.
"; exit; }
die "no recepients to send mail to" if ($#ARGV < 0);
@emailbody = <STDIN> ;
# send the message
$message = Net::LMTP->new($opts{'s'},$opts{'p'}) || die "can't talk to server $opts{'s'}\n";
$message->mail($opts{'f'}); $message->to(@ARGV) || die "failed to send to the recepients ",join(",",@ARGV),": $!"; $message->data(); $message->datasend("To: " . join(", ",@ARGV) . "\n"); $message->datasend(@emailbody); $message->dataend(); $message->quit;
Rick