GroupWare   
http://www.altn.com

MDaemon GroupWare unlocks the collaborative functions of Microsoft Outlook using MDaemon as the mail server platform. Outlook users can share Calendar, Tasks, Contacts, Notes, and Journal folders without the expense or expertise required by Microsoft Exchange Server. Features include user configurable permissions where GroupWare users has control over the permissions of which folder(s) they wish to share with other users, WorldClient (MDaemon's web-based email client) will allow you to see items in your Outlook calendar from anywhere, and GroupWare licensing is independent of your MDaemon license size.

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.

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.

No Spam Today! SMTP Proxy   
http://www.byteplant.com

No Spam Today! is an SMTP proxy server based spam filter that sits between the internet and your mail server. Incoming mail is accepted from the open internet, checked for spam, and is then delivered to your existing SMTP mail server. NoSpamToday! uses the award-winning SpamAssassin engine to flag spam mail in the subject line and add a filtering report to spam mails according to your configuration. When installing No Spam Today! you will get: 1. A complete one stop setup routine that installs one of the world's most advanced and thorough spam filters on your server in a matter of minutes. 2. A reliable SMTP proxy service software that makes it easy to integrate No Spam Today! into any existing SMTP infrastructure 3. An easy to use Admin Wizard to configure all important settings of No Spam Today! and the SpamAssassin engine 4. Updates, e.g. when new versions of the SpamAssassin engine are released 5. An attachment blocker, and built-in support for third-party virus checkers 6. Free support (for commercial editions only) For commercial use we offer a pricing for No Spam Today! that offers exceptional value! For personal, non-commercial use there is a fully functional Freeware Edition of No Spam Today! (see website) NoSpamToday! works with products of all vendors of mail server software.

No Spam Today! SMTP Proxy Free   
http://www.byteplant.com

No Spam Today! is an SMTP proxy server based spam filter that sits between the internet and your mail server. Incoming mail is accepted from the open internet, checked for spam, and is then delivered to your existing SMTP mail server. NoSpamToday! uses the award-winning SpamAssassin engine to flag spam mail in the subject line and add a filtering report to spam mails according to your configuration. When installing No Spam Today! you will get: 1. A complete one stop setup routine that installs one of the world's most advanced and thorough spam filters on your server in a matter of minutes. 2. A reliable SMTP proxy service software that makes it easy to integrate No Spam Today! into any existing SMTP infrastructure 3. An easy to use Admin Wizard to configure all important settings of No Spam Today! and the SpamAssassin engine 4. Updates, e.g. when new versions of the SpamAssassin engine are released 5. An attachment blocker, and built-in support for third-party virus checkers 6. Free support (for commercial editions only) For commercial use we offer a pricing for No Spam Today! that offers exceptional value! For personal, non-commercial use there is a fully functional Freeware Edition of No Spam Today! (see website) NoSpamToday! works with products of all vendors of mail server software.