Protocols
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Mailbox formats
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QMail Maildir
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Unix Mbox
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IMAP Server-Side Folders
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Mail Formats
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MIME Messages - RFC 2045, RFC 2046, RFC 2047, RFC 2048, RFC 2049
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HTML Messages - RFC (?)
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Email Attachments - RFC
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Functionality
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Multiple simultaneously active accounts
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Modular design
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Integrated Addressbook
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Importable/Exportable Addressbook formats:
VCARD, MS Outlook 4/5/6, Evolution, Pine
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User programmable mail filters
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Drag and Drop between mail folders
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External handlers for any MIME type, including HTML mail
(completely user configurable)
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Privacy and Security
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Encryption of personal settings and mail folder(s)
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Security Multiparts for MIME
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PGP Message Exchange Formats
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Privacy-Enhanced Mail (PEM)
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MD5 Message-Digest Algorithm, etc.
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