Which corporate mail server do you prefer?

Question

System administration

The question arose recently - how to serve employees with good mail? For this you need a good email server. Exchange didn't fit for no reason.

Question:
What good server can I buy in order to:
1) Make an anti-spam filter
2) Filter emails on my own.
3) Provide an interface for the WEB via HTTPS

This requires distributed administration - so that people from Lubyanka cannot read the emails of people from Sakhalin, but can reconfigure filters for Lubyanka without touching Sakhalin.

Any solution that scales and reconfigures well will do. OS - any, except for esoteric ones. Scope - Starting at 1,000 users with the ability to expand to millions.

Answer 1

Standard set: Postfix+Dovecot+SpamAssasin+Sieve

Answer 2

www.zimbra.com/ - have you looked?

Answer 3

www.iredmail.org/ ?

Answer 4

Corporate gmail is quite convenient, we use it.

Answer 5

pineapp.com, ru - also works.
It's more of an anti-spam solution than a mail server, but worth a look.
Everything in one box + the distribution of rights is excellent, well, the entrance via HTTPS to the webmord.

Answer 6

And what didn’t suit Exchange, except for the cost of the server and client licenses for which everyone clogs and the fact that it will have to be studied, although this is a big plus for the resume.

Answer 7

zimbra. We migrated from exchange to it - the flight is normal, many employees stopped using the mail client altogether. When there was Exchange, it was impossible to force users to use the web face. Only if a lot of people will use imap - stock up on more powerful hardware.

Answer 8

Communigate.

Answer 9

>>Span - Starting at 1,000 users with the ability to expand to millions.
If this is promising, why not hire people and they will organize everything for you?

Answer 10

From the "enterprise" in addition to Microsoft Exchange, you can look towards IBM Lotus Domino or VMware Zimbra. For anti-spam / anti-virus scanning, you can use various software solutions, or some appliance, such as Cisco Ironport. However, if your case does not require any functionality other than a mail server, then such solutions may be redundant.
PS They all have one common drawback - they cost money. :-)

Answer 11

Open-Xchange?

Answer 12

It's strange that no one has yet recommended Alt-N MDaemon, which, in general (as far as I remember), copes with the above tasks. Well, and Symantec Messaging Gateway as an anti-spam, and, in theory, happiness should come, since it is configured quite simply.
I also heard good reviews about the Zimbra mailer, which was already advised here a couple of times. But, if there is even the slightest opportunity to convince you to install Exchange, convince to the last.

Answer 13

Kerio still