> > > On 12/19/2012 6:59 PM, Joseph Tam wrote: >> Rajesh M writes: >> >>> i am planning to migrate from qmail pop3 to dovecot pop3 >>> >>> the number of users on the server is large over 5000 >>> ... >>> also data volume is large - over 3.5 tb -- ie many users several 1000s >>> of >>> emails in their inbox >> >> If you stay on the list, you might find some people here whose >> mail metrics are several orders of magnitude larger than this. >> >>> 1) will the migration cause all the emails on the server to re-download >>> ... >>> 4) has anybody migrated from qmail pop3 to dovecot pop3 successfully >>> without emails being downloaded again >> >> A proper migration will avoid this. Google is your friend >> >> http://lmgtfy.com/q=POP+qmail+to+dovecot+migration >> >> The top hits provide exactly what you're looking for. >> >>> 2) can dovecot be configured to allow only one download at a time - >>> pop3 >>> locking with time out setting that can be customized > > We migrated 5000+ from qpopper years ago. Dovecot is sooo much better on > system load. Yes, locking and timeouts are in the config file. > >>> >>> 3) can dovecot pop3 be configured so that it will allow download of >>> emails >>> only of the last say 15 days ie even if the same pop3 user is >>> configure on >>> another machine it will download only messages of the last 15 days > > That's not part of pop3, so no, it's not possible with dovecot alone. > You could probably work out a plugin to move read mail after x days, or > there may be one out there ? Or some imap robot could do it.. > Ken A. > Pacific.Net > > >> I can't answer this, but if this is an attempt to prevent mass download, >> the answer to 1+4 makes these questions irrelevant. >> >> Joseph Tam <jtam.h...@gmail.com> >> > > -- > Ken Anderson > Pacific Internet - http://www.pacific.net > Latest Pacific.Net Status - http://twitter.com/pacnetstatus >
thanks joseph and ken for your replies ken, if possible can you please give me some more information concerning the servers that you use. i am using qmailtoaster my server has over 3 tb of data. Q1) which email server software are you using for your 5000+ users Q2) what is your server hardware configuration for handling 5000+ users Q3) do you users store several 1000's of emails in their inboxes. Q4) i want to try out by running dovecot pop3 on a separate port other than 110 while qmail toaster pop3 continues to run on port 110 and try downloading from specific a test mailbox. do you forsee any problems in this ? thank you once again for your kind help. rajesh
