Suggest mail system for small business

Question

Mail server

Good day!
I administer a small business for 10 people. At the moment there is a living hell with the mail. Several mailboxes are registered at the enterprise - part on mail.ru, part on yandex.ru, part on a normal domain. As clients, The Bat is used (on all machines). Each client is configured for all mailboxes. The downloaded mail ends up in a shared network folder. If one person downloads mail, it appears in others.
And this system worked for the time being, until the mail archives reached the size of 10-20GB. And everything began to hang, and everything began to break.
And since I myself have little sense in administration, I ask for advice - how can I replace such a system? Those. collecting mail from all mailboxes, synchronizing it with clients. It is desirable that the software be free.

Answer 1

Google Apps

Answer 2

pdd.yandex.ru or leave everything as it is, but store mail for each client on the machine. Let the client when he downloads his mail - leaves it on the server.

Answer 3

Why not put a local mail server on *nix? Buying a domain costs a penny. And nobody canceled a sheaf of exim+dovecot+mysql. Set once and forget for a long time. Manuals for raising heaps in the network can be deployed in 20 minutes.

Answer 4

Google Apps - IMAP, mailings, easy administration

Answer 5

It's high time to go to the clouds and not waste resources on supporting your own solutions.
Google Apps

Answer 6

habrahabr.ru/post/131179/

Answer 7

Zimbra still can advise

Answer 8

Google Apps, Office 365.
Use a web face, in extreme cases - an IMAP client of your choice.

Answer 9

http://xserver.a-real.ru/ ?