On 1/26/2012 2:54 PM, Matteo Cazzador wrote: > Hello, i'va a particular question about mail server. > Suppose a customer have more than one locations > in different geographic sites, each one with a mail server with the same > domain. > Is it possible to forward every user mail to every locations mail > servers ? i think it's possible, > i like to do it with a single node mail server extrernal from locations, > that forward to every location mail server. > My customer receive big mail so i don't want to use vpn from locations > to consult it. > But i've a problem. > Is it possibile to consult user mail in one location on specific > location mail server using imap. > The difficult is how i can propagate to every mail server action that > users made. > Example: if user in location one read mail on server one, i want that in > server two the same mail result read and not new. > Is it possible to do so with a specific postfix imap configuration? > Like an imap cluster? i can't use nfs or virtual disk. > Thank's a lot
Postfix is an SMTP server. It has nothing to do with IMAP, and cannot do what you desire. What you seem to be wanting is an active/active IMAP cluster where changes to mailbox files are reflected immediately on both servers. You can do this with Dovecot using DRBD and GFS2 over TCP/IP. Be aware this isn't going to work well for geographically dispersed cluster nodes, when network latency is high and bandwidth is low, and link reliability is not ~100%. Depending on the traffic load of these nodes, you may need a dedicated 10 Mb/s or 100Mb/s link between the two sites. Using public internet connections for such a cluster setup is not wise. Note that this is an engineered solution from the hardware up. You cannot retrofit such a setup to existing servers. If you are already using Dovecot please post your question on the Dovecot list. If you are using Courier or another IMAP server, please ask on the appropriate mailing list. -- Stan
