Gemini is the multi-platform version of our successful Messenger Pro Email and news software. It is an advanced multi-platform messaging client with strong facilities for managing mail and news from multiple sources. Supporting POP3 and IMAP based mail accounts and NNTP news, it is currently available for the Linux, Windows and Mac OS X platforms.
A list of some of its features is given below, but the best way to get a feel for its abilities is to try Gemini for yourself. Alternatively, its user manual is available for download which will also give you a good impression of its features and abilities. Please note that the availability of features depends on the particular edition purchased, details of which are shown below.

Mail and News in a Single Window
Gemini handles both mail and news and presents a consistent user interface providing access to both. This improves ease of use since the skills learnt handling Email can be applied to news and vice versa and also provides the convenience of having everything kept in one place, however if preferred, groups and messages can be opened in separate windows.
Junk Mail Filtering
Gemini features a sophisticated Bayesian junk mail filter that automatically learns how to distinguish between the junk mail you receive and your normal mail, filtering the junk into a separate folder so that you don't need to see it and automatically deleting it shortly after. All you have to do is tell it when it gets it wrong and it'll quickly learn from its mistakes.
Security
Gemini contains a number of specific security features to help protect your privacy and keep your machine safe from Email based viruses. Messages are rendered using a simple rich text engine which doesn't support scripting, hence making Gemini immune to script based viruses.

The display of images is disabled by default which prevents the user from accidentally seeing inappropriate material, but also prevents remote image fetches from confirming your receipt of the message and thus confirming the validity of your Email address for sending junk mail.

Gemini also supports SSL encryption for all transfer protocols, thus ensuring that your login details and your messages can not be intercepted.

Templates and Auto-Replies
Templates can be set up allowing easy sending of messages that have a standard format. Templates can also be used to send standard replies, which can optionally be automated.

Attachment Support
Gemini supports MIME, UUCode and YEnc formats for decoding and sending attachments. UUCode and YEnc encoded files split across multiple messages can also be decoded.

Support for Plain and Rich Text (HTML) Messages
Gemini's rich text engine is capable of rendering HTML including tables and images and messages may also be sent in rich text if desired. Default settings are such that good netiquette is promoted by discouraging inappropriate use of this feature.

Colouring of Messages
Messages are coloured so that quoted text appears in a different colour to normal text, with support for multiple levels and colours. This is a useful reading aid since it helps distinguish old text from new, especially when multiple levels of quoting have been used, helping to separate out each person's comments. Messages can also be coloured in folder listings to indicate they have certain properties, as determined by filtering and scoring rules.

Filtering and Scoring
Gemini contains strong features for identifying messages and performing a range of actions on them, automatically deleting messages are filtering them to other folders. Any part of the message's header can be tested and as many tests can be created as you want, combining them using either AND or OR logic.
Flexible Folder Display
Each folder or newsgroup can have its own display settings, allowing you to choose from a range of fields to display. Columns can be resized and reordered according to your preferences, and each can be used to sort messages into a particular order.

Threading of Messages
Messages are threaded so that messages belonging to a particular conversation are grouped together and displayed so that the structure of the discussion can be seen with respect to which messages are replies and the messages they reply to. A menu is also made available allowing quick access to the replies of a particular message, its predecessors and its siblings in the thread.

Mailing List Support
Messages received from mailing lists can be filtered into their own folders and listed separately as specific mailing list folders. Such folders are configured with the list posting address and thus the mailing list can be treated as a newsgroup, allowing threading of messages and providing separate post, reply and followup options, determining the correct Email address(es) to use in each case.

Support for Multiple Accounts and Identities
Gemini allows as many mail and news accounts to be created as you like, automatically connecting to them and transferring messages at specified intervals.

Support for Offline and Online Use
Mail and news can be read online while connected to the Internet or downloaded for later viewing offline. IMAP accounts are supported which allow mail to be stored on remote mail servers with messages only downloaded as you read them; POP3 accounts are also supported.

Both mail and news can be configured to download message headers only, automatically retrieving their bodies when the message is opened.

Flexible New Arrivals Notification
Gemini's new messages window allows at a glance viewing of new messages, including their subject and sender, and easy opening of messages from this window.
Editing of Messages
Messages stored in Gemini's database can be edited and saved back, perhaps to add annotations, to correct messages or to strip out unneeded content before archiving.

Spell Checking
A spell checker including American and British dictionaries is included, allowing you to check messages you write for errors before sending. Custom dictionaries may also be created.

Easy Access to Message Source and Headers
If you know what you're looking for, Gemini doesn't hide the message header from you. A single button click will open the message in its raw form, including its header, allowing you to look for suitable headers on which to construct filters.

Comprehensive Address Book
Gemini's address list holds more than just a list of Email addresses: full postal and telephone details can be stored, comprising both private and work details, as well as birthdays, job titles, web pages and free-form notes.

Standards and Netiquette Compliant
Gemini conforms to the standards set in the relevant RFCs for mail and news, as well as the latest Internet drafts and proposed standards. It also performs strict message checking to ensure that users send messages conforming to established netiquette conventions, thus promoting good practice and helping its users to be seen as good net citizens by their peers.

Gemini Mail is the entry level edition with full Email support, Gemini Groups adds newsgroup and mailing list support, and the top end Gemini Professional includes all of this plus an integrated calendar.

The license of this software is Free Trial Software, the price is $159.00, you can free download and get a free trial.