Email for active users in a small organization

Question

System administration

Good day!

There is a small organization of 14 people. A virtual hosting was purchased, on which the site is spinning and mail is sewn there, it is quite standard.
Users on pop3 receive mail, on smtp give. 3 people (managers) sit on Windows and receive mail through the purchased TheBAT!, the rest on Linux through Claws Mail. For 3 years, managers have accumulated so much correspondence-mail that a complete backup of TheBAT profiles! eats up about 48 GB, and how it slows down, for example, when searching for a letter by content, you can talk for hours. At the same time, they don’t want to archive mail and use mail, for example, over the past six months, because many letters are important even after six months and access to them is needed now, and not through archival trash.

I would like to implement something like this:


Tell me, share your experience, is it realistic to implement? Perhaps there are already ready-made products for using this within the company (not gmail :) ). I don't want to reinvent the wheel.

Answer 1

srv_out = postfix + dovecot.
srv_in = postfix + dovecot + roundcube.
Storing a list of users for dovecot - in the passwd backend,
for postfix - a crutch for cron.
Synchronization of mailboxes from srv_out to srv_in can be done in many ways:
via isync, fetchmail, procmail with two recipients, etc.
First, make the option that seems the easiest, then improve if necessary.

Answer 2

Zimbra.
In general, you can give 4 bucks a month for a user to the same Office365 and forget about mail and antispam on the server in general.
Already two of my friends are transferring companies to the cloud, it turns out to be much cheaper than maintaining and maintaining server hardware and software + renting space and channels for it ...