MailDrop sends personalized, individual emails with full support for custom variables (see below), attachments, HTML email, and much much more.

• Unlimited undo/redo
• Keyboard shortcuts galore
• Simple, powerful preferences
• Automatic spell checking of messages (preference)
• Full keyboard navigation support
• Toolbar with buttons for commonly used actions
• Automatic variable-strength data file compression
• Import/Export to/from XML, comma-separated, and tab-delimited files
• iTunes-like "filter" search box.
• Ten custom variables (now completely renameable)
• Custom date/time formatter creates over 1,000 date/time strings
• Eleven standard variables, including date, time, name, subject
• Custom header control for eight fields, including X-Mailer and Organization
• Spam-proof technology makes MailDrop an unattractive product for spammers without hindering valid use
• HTML and plain text support
• Intelligent HTML system delivers email as plain text in older email clients
• Full attachment support, automatic cross-platform compression of folders and/or files as a preference
• Fully Unicode compliant
• Pervasive drag-and-drop
• Status support for filtering recipients
• Duplicate address checking
• Advanced parser for weeding out invalid email addresses
• Message preview allows you to view each customized email before sending
• Full ESMTP Authentication
• Integrated mailer sends mailings within MailDrop: no need for another mail client
• MailDrop can play sounds for each success or error or be silent
• Gorgeous photo-illustrative icons
• Drag-and-Drop installation
• Gorgeous toolbar
• Dock-aware/savvy
• Full service support
• Full cut/copy/paste support
• Multithreaded
• Proxy icons
• AppleScript aware
• Smart editing
• Internet Config support