MDaemon   
http://www.altn.com

MDaemon , Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs. MDaemon features include top-notch antispam security features; seamless integration with AntiVirus for MDaemon plug-in; built-in groupware functionalities for sharing folders, tasks, contacts, and address; separately licensed plug-in for Outlook users to access groupware functionalities using MDaemon as the mail server and groupware platform; secure instant messaging; free web-based email client; remote administration tool; central address book repository; and much more! MDaemon 8.1 new feature includes the first implementation of DomainKeys Identified Mail (DKIM) for the Microsoft Windows platform. DKIM validates the sender address and message integrity of each email received. MDaemon creates outbound signatures and validates inbound messages signed with DKIM. Read Alt-N's published white paper on DKIM and its implementation in MDaemon at http://www.altn.com/support/white_papers.asp. In addition to DKIM, MDaemon 8.1 includes support for Greylisting, a relatively new spam fighting technique which involves deferring the initial acceptance of a new mail message from unknown senders and tells the sending email server to try again later. When the sending server tries a second time - which most spam sources will not do - MDaemon will accept it. Exception options and white lists can exempt trusted senders from greylist processing. MDaemon 8.1 builds on the groupware, security and administrative improvements made available with MDaemon 8.0. MDaemon now includes free groupware functions, including shared calendars, contacts and task lists. It also continues to lead the industry in email security, professional fine-tuning and beginner ease of use.

GroupMAN   
http://www.tnlsoft.com

GroupMAN (Group Manager) functions as a list-server program and makes it easy to create and manage both announcement mailing lists and interactive discussions on your Windows PC. GroupMAN is unique because it's designed to work from your personal electronic- mail address, as opposed to dedicated accounts on a list server. To use GroupMAN, you don't even need a dedicated mail server -- all you need is access to a POP3 server (which comes with virtually every Internet-access account) and some version of Windows. Setting up GroupMAN is as easy as setting up a regular mail program. -Manage multiple lists from a single POP email account, -Unlimited Number Of Lists, Each group can maintain a file repository -Create moderated lists, announcement only lists, and general discussion lists. -Allow subscribers to have DIGEST ONLY subscriptions -Create public or private lists. -Create reminders for project management related lists. -Allow or Disallow attachments for any given list. -GroupMAN can run autonomously in the background with no user intervention. -As with most list-server software commands are requested through standard email. GroupMAN offers many of the same standard list-server subject line commands. -If the preset subject line commands are not enough you can create your own subject line commands each command you create is capable of carrying out one task or 100 tasks. -GroupMAN can publish a website containing message archives, file archives, and general statistics. -Have replies go to either the list itself, original author or the list owner. - Ban an abusive subscriber from your list preventing them from posting or receiving emails. -Customizable set of email templates with full support of internal variables. -Create custom filters to incoming mail to screen out bounced mail, auto-replies spam and attachments with certain extensions.

Email Validator   
http://www.bytefoundry.com

Email Validator checks deliverability of email addresses. It does so by first performing a DNS query on the domain name of each email address in order to determine the address of the mail server servicing that domain. Once the mail server is found, a connection is made in the same way as your ISP's mail server would make a connection. Email validator will first attempt to use the SMTP VRFY command to determine deliverability. If the VRFY command is enabled, the mail server will report whether the email address being tested is in fact deliverable, Email Validator will then close the connection and report the result. In many cases the VRFY command is disabled on SMTP servers. If this is the case for any given mail server, Email Validator will then attempt to simulate the delivery of an email message. During this process, the mail server will report whether or not it can accept a message for the email address being tested. Once this is reported, Email Validator will close the connection and report the result. NO EMAIL IS ACTUALLY SENT. Email Validator never gets to that point, so the owner of the email address will not receive any message as a result. Once a list of email addresses has been tested, the user may export all addresses along with test results or simply export all deliverable or non-deliverable addresses in order to clean an existing list or build a new one containing only deliverable addresses. The result for anyone who runs a mailing list, i.e. ezine and newsletter publishers, businesses, political parties, non-profit organizations, etc. can save time and money by sending mail only to deliverable addresses and not have to clean delivery failure notices out of their inboxes.

Ability Mail Server   
http://www.code-crafters.com

Ability Mail Server is an advanced, secure and high performing mail server. Featuring SMTP, POP3, IMAP4, WebMail, Remote Admin, LDAP, SSL, SPAM Protection with Bayesian and RBL filters, Antivirus Protection, Content Filtering, POP3 retrievals, ODBC, mailing lists, static routing, aliases, redirections, auto-responses, multiple folders, address books and much more. Combines maximum functionality with ease of use.

Freedomizer Guard-1   
http://www.freedomizer.com

Freedomizer Guard-1 is a New and unique Program. For the first time ever, FG-1 is dedicated to protect mail traffic transmitted via SMTP and POP3 protocols. It easily communicates with all known mail clients, such as Outlook, Mozilla, etc. The program provides traffic protection with the help of SSL protocol by establishing a secure connection between a client and an intermediate Protection Server. The program offers an interesting and user-friendly interface. A “one click” principle is used to establish a secure connection. A free Protection Server account is provided for the trial period.