I.e. Gmail (web and app clients), polling Rackspace Mail (sending/receiving), sitting behind Barracuda Email Security Service (spam filtering & anti-malware), s

I.e. Gmail (web and app clients), polling Rackspace Mail (sending/receiving), sitting behind Barracuda Email Security Service (spam filtering & anti-malware), synced to GMVault (archive/backup)? The only problem is the limited number of options for some of those pieces. SMTP/POP/IMAP enable all the the mixing and matching you want.