Re: E-mail solution for 15,000 users

With a large number of users, the files would have to be distributed
over a number of file servers. A single IMAP server and web based MUA
are likely to become bottlenecks. What would be a good solution there.

> > Is a documented qmail solution available for a large number of active users.
>  What is your definition of 'documented qmail solution' ?
A diagram of the system accounting for all the aspects would be helpful.

> For your record, IndiMail has been used for at least 3 million users
> (1.2 million active).
> Has been used by SBI for its employees. Being used by sites like
> matrimony.com, mindtree, Tata Communications.
> IndiMail proves an MTA based on qmail, IMAP/POP3 based on
> courier-imap, web admin tool. Works with IPV6 and provides TLS, DKIM,
> SRS, and almost any feature available in the qmail universe.
> It has docker images too so that you can try it out without much
> effort. You can try source installation or try the RPM/DEB packages
> available on openSUSE build service and the solution works on a
> RaspberryPI too.
> 
> > Here, the MTA is not the only challenge.
> >
> > A good web based MUA and appropriate file system is also needed.
> >
> 
> You can try out roundcube. We use it for all our employees at tagrem.com
> 
> > The setup needs to have inherent facilities for recovery and maintenance.
> >
> 
> You can have a Journalling Filesystem and sufficient RAID or Mirror
> (or preferably both) disc arrays to cover you against failure.

-C