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I currently have an old &quot;on-prem&quot; Exchange email server with about 100 users.<br />
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What non-Exchange email server do you recommend for basic email since I probably do not want to spend $400/mth for HOSTED Exchange since I just need basic email and am willing to do &quot;on-prem&quot; if needed.<br />
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<a href="http://www.imailserver.com" rel="ugc">http://www.imailserver.com</a><br />
<a href="http://www.zarafa.com" rel="ugc">http://www.zarafa.com</a><br />
<a href="http://www.zimbra.com" rel="ugc">http://www.zimbra.com</a><br />
<a href="http://www.mailenable.com/exchange-alternative-comparison.asp" rel="ugc">http://www.mailenable.com/exchange-alternative-comparison.asp</a><br />
etc
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I currently have an old "on-prem" Exchange email server with about 100 users.

What non-Exchange email server do you recommend for basic email since I probably do not want to spend $400/mth for HOSTED Exchange since I just need basic email and am willing to do "on-prem" if needed.

http://www.imailserver.com
http://www.zarafa.com
http://www.zimbra.com
http://www.mailenable.com/exchange-alternative-comparison.asp
etc

Email Server -- Recommendations ?

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

An email client, email reader or more formally mail user agent (MUA) is a computer program used to access and manage a user's email. A web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.

Email Software

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.