Mail server migration and HOLDing mail at Mailscanner

Simon greminn at
Tue Mar 8 07:09:23 UTC 2016

Thanks for the replies, the problem with shutting down all mail is that
will also stop mail to our dovecot Mail platform, which is not going to be
offline for any migration... So 90% of clients will not receive mail so
that I can clean up the dbmail server (that has 10% of clients on it).

A fun tip, the dbmail server uses innodb... I have one table which is 650GB.

Its going to take about 2 hours to migrate the DB over to new MySQL server,
after which the table is 70GB. I was just concerned about mail bouncing
during that time because it could not deliver to the dbmail server. I might
check out postfix retry time..

On Tuesday, 8 March 2016, Jerry Benton <jerry.benton at> wrote:

> If you shut down MailScanner and Postfix, obviously no email will be
> processed. You can also shut down MailScanner and make sure Postfix is
> started and it will accept the email and hold it in /var/spool/postfix/hold
> until you start MailScanner again.
> -
> Jerry Benton
> On Mar 7, 2016, at 8:41 PM, Simon Buchanan <greminn at
> <javascript:_e(%7B%7D,'cvml','greminn at');>> wrote:
> Hi There,
> We have Mailscanner/postfix setup on centos and working well. It delivers
> mail to two seperate mail servers (dovecot and dbmail) depending on the
> domain (most clients are on our new dovecot platform, a few are on our old
> dbmail platform).
> dovecot is delivered via
> dbmail is delivered via a dbmail-lmtp
> service:
> We are about to perform a lengthy migration of the dbmail server, and need
> to simply stop Mailscanner processing mail for dbmail  until we are back up
> and running again. Is there anyway todo this, or is this a postfix question?
> Thanks!
> Simon
> --
> MailScanner mailing list
> mailscanner at
> <javascript:_e(%7B%7D,'cvml','mailscanner at');>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the MailScanner mailing list