You may try look up ZhangHuangbin, author of iredmail.org & dbmailadmin.org, a great postfix mail integrator. Nice guy.
For your case, see dbmail.org, a fast scalable sql based mail services. Best regards. Snowie On Tuesday, April 17, 2012 03:54 PM, Frank Bonnet wrote: > Hello > > I need some feedbacks advices of experienced admins > I will have to setup in few monthes an email system > for approx 50K "intensives" users. > > The only mandatory thing will be I must use HP proliant servers > > The operating system will be FreeBSD or Linux > > Thank you for any advices > >