Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My company is using Microsoft Mail and the company want to upgrade the mail server, but does not have enough cash for expending on an Exchange, so I was wondering what are the free alternatives out there that permits us to:

  • Configure a Mail Server for Intranet
  • Configure a Mail Server for Internet (optional, not too important right now, but cool)
  • Permit working with various mail clients (Outlook Express, Office Outlook, Maybe ThunderBird, something easy for users)
  • Basic Mail Features (inbox, folders, attach files, groups)

Thanks in advance


locked by HopelessN00b Dec 5 '14 at 12:21

This question exists because it has historical significance, but it is not considered a good, on-topic question for this site, so please do not use it as evidence that you can ask similar questions here. This question and its answers are frozen and cannot be changed. More info: help center.

closed as off topic by Chris S Aug 26 '12 at 4:03

Questions on Server Fault are expected to relate to server, networking, or related infrastructure administration within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

Shopping Questions are Off-Topic on any of the Stack Exchange sites. See Q&A is hard, lets go Shopping and the FAQ for more details. – Chris S Aug 26 '12 at 4:03

10 Answers 10

up vote 1 down vote accepted

I'd recommend Mercury Mail System, from the makers of Pegasus mail.

it's a community edition and free!

Excuse me... this is the same one bundled with XAMPP? – Jhonny D. Cano -Leftware- May 28 '09 at 20:15
Yes, I think you're right. – user4767 May 28 '09 at 20:16
+1 for Mercury, I've been running it for almost 10 years and no issues with it. The only thing it's missing is webmail. – Jimmie R. Houts May 28 '09 at 20:28

Maybe hMailServer?

It sounds like it does what you want, but I've never used it.

+1 used it; liked it as a pop3 server. works well with ASSP as its smtp component. Integrated with ClamAv flawlessly. – p.campbell May 30 '09 at 4:16
Tried Hmail server before on a dedicated server for Windows hosting. It does the job but i run into corrupted database problem. It use MySQL i believe. I'm not sure about the current version but all the previous version was kind of disappointing. I end up switching over to SmarterMail. – Jack May 30 '09 at 5:53

You might want to check out It's not free, but it's a full featured and supported product. They have a 30 day free trail available and prices start at $595.00 for 10 users.

+1 for iMail .. Ipswitch is a great company. And the price specified includes A/V, anti-spam and instant messaging. There are more basic versions that cost less than half. And it doesn't have CALs! – tomjedrz May 28 '09 at 20:33

MailEnable offers free versions of their product.


I was wondering what are the free alternatives out there that permits us to:

Instead of running your own mail server you should at least consider using something like Google Apps or another hosted service. You may be able to get the service for free. You won't have to maintain servers yourself.

I agree with the ease of maintenance by "outsourcing" the servers, but not all the users have Internet access nor they should either, so I probably need a "offline" solution – Jhonny D. Cano -Leftware- May 28 '09 at 20:30

Check out this Server Fault question for a few mail servers What kind of mail server do you use?


I believe scalix supports .pst's. This may or may not be important to you.


Search for zarafa, zimbra, citadel, scalix....


I will second Google Apps for Domains. I have deployed them at two client sites and it works great! It is free for up to 100 users. html

Until, they change the TOS so now you can only have 10 free accounts. – Darrel Miller Jul 14 '11 at 14:47

Here are 2 alternatives:

  1. Hosted Messaging Solution - Checkout Google Apps, Microsoft Exchange Online or any other 3rd party hosting solution. You will pay per mailbox, but will save greatly Hardware, Licensing (if any), Implementation and regular manitainence costs.

  2. Open Source Message products - EXIM is the best. Simple & Stable.



Not the answer you're looking for? Browse other questions tagged or ask your own question.