Hi all,
AT present we have our polling interval set to 10 minutes... and we cant really reduce to less for POP3 unless we move our external server to a VPS at the host and they whitelist our IP so we can have a more real time sync via POP3.

The problem with the above solution is that its going to cost us 1200+ USD a year to have a remote VPS server, instead of the standard web space.

The other option is to move our zimbra server from downloading email via POP3 to IMAP. The problem with that .. is that we have some email accounts that are 10gb+ and our external email space is about 5GB max..

So i am open to suggestions on how best we can have a more real time sync between our internal zimbra server and the external email server/webspace we have with site5.com