The Pro version adds the following exclusive features:
â€¢ Styled text format support - Bold, Italic, Underline, Color, Font, Size...
â€¢ Conditional message contents depending on optional tags value.
â€¢ 20 Custom Tags for advanced mail merge.
â€¢ Ability to process tags in subject.
â€¢ 13 date tags, Long Date, Short Date, Abbreviated Date, Long Time, Short Time...
â€¢ Quick selector in order to check/uncheck recipients depending on their values.
â€¢ Recipients creation directly from Filemaker. (Mac OS X only)
â€¢ Hyperlink manager to insert text and HTML hyperlinks tags with one click.
â€¢ Full Applescript support. (Mac OS X only)
â€¢ Full mySQL and postgreSQL database support.
â€¢ Secure SSL connection support.
About click-through tracking check the following page