Connection Security

• Connections to the mail server can be secured with SSL/TLS encryption.  This prevents an eavesdropper from reading your mail.
• Mail server passwords are verified using the CRAM-MD5 method, which is able to confirm the password without ever transmitting it.  This prevents an eavesdropper from intercepting the password.
• Supports Yahoo! DomainKeys signing and verification.  This ensures that an email has not been tampered with, and that the sender has not been forged.

Internal Security

• All passwords are internally stored with encryption to ensure that they are safe from attackers.
• Stored messages can be encrypted to prevent them from being read by attackers.
• Mailboxes can be password protected.  This prevents mail from being read or composed even if physical access to the computer is compromised.
• Sensitive messages can be shredded in such a way that no forensic recovery is possible.

Virus Security

• Until permitted, HTML email is restricted from running scripts, loading embedded objects, and downloading media.  Malware cannot infect the computer simply by viewing an email.
• The Address Book is encrypted to prevent malware from spreading to your contacts.
• The user is warned before opening dangerous attachments.
• Clyton is compatible with third-party anti-virus email scanners.

Blacklisting

• DNSBL blacklist testing is fully supported.  Spamhaus is the recommended blacklist, as it is very high quality and well maintained.
• Email that is suspicious but not obviously spam is quarantined for 24 hours, then retested.  This greatly improves the effectiveness of blacklisting because it prevents spam from slipping through before the blacklist has a chance to notice.
• Every server that the email is routed through is tested for blacklisting.
• Every hyperlink in the email body is tested for blacklisting.

Rules

• There are 15 stock rules that help identify spam.  Chinese spam and image spam are almost always detected by these rules.
• A table of over 400 custom rules comes pre-configured to identify spam.  For example, an email can be penalized for having a hyperlink to a certain type of file, such as an EXE.  The user can add their own rules to this table.

Curses

• A "Curse" is a short phrase that adds a penalty to an email's spam score.  "Viagra" and "get rich quick" are examples.
• Approximately 1000 curses are preconfigured.  The user can easily add their own curses as well.
• Clyton can recognize many character substitutions when detecting curses.  For example, substituting "@" for A or "!" for I or L will not fool Clyton.

• Built-in address book supports custom fields and import/export.
• Send personalized mass mail to a filtered set of address book contacts.
• Supports text search in a single folder or globally.
• Whitelisting prevents false positives by the spam engine.  Whitelisted senders and address book contacts are never treated as spam.
• Supports message templates with merged fields.
• Message drag & drop supported.
• Attachment viewer supports a wide variety of image formats, HTML, and MIME.  Images can be zoomed in and out.
• Multithreaded design keeps the user interface responsive.  Receiving, sending, and spam checking are performed in the background by worker threads.
• Compose email formatted in HTML with a powerful editor.  Includes spell-checking.
• Supports both POP3 and IMAP4 mail server protocols.

• Works with GMail and Yahoo.
• Messages can be organized in folders and color coded.
• Multiple messages can be selected with the Shift and Ctrl keys.  The following features can operate on multiple messages:  Delete, Forward, Redirect, Save, Shred, Drag & Drop, and Color Coding.
• The Forward and Redirect features support multiple destination addresses.
• Old messages can be automatically deleted (by age or count) from the Trash and Spam folders.
• Attachments can be automatically included in newly composed messages.
• Reminds of birthdays and anniversaries.
• Skinnable, highly configurable user interface.
• Most of Gammadyne Mailer's G-Merge language is supported in templates, mass mailings, and an Incoming Script.  The Incoming Script runs each time an email is received.  It can modify messages, move them to different folders, control deletion, and much more.

• The download is a self-contained executable installer.  Simply open the file to begin installation.
• The download is approximately 7.5 MB and installation will use approximately 12 MB of hard disk space.
• If you prefer to download the installer inside of a .zip file, click here.
• To update an existing installation, simply install the new version over the old one.

• The Mass Mail tool is disabled.
• The Search All tool is disabled.
• The Incoming Script is disabled.
• The Encrypt Stored Email feature is disabled.
• The Lock Mailbox feature is disabled.
• SSL/TLS encryption is disabled.
• G-Merge Functions cannot be used in Templates.
• The Auto-Attachments feature is disabled.
• The Encrypt/Decrypt All tool is disabled.
• The Shred tool and Shred Old Messages option are disabled.
• The Empty Folder tool is disabled.
• Support for DomainKeys is disabled.