Mercury/32 Mail Transport System

What's new in Mercury/32 Mail Transport System 4.80.149:

• Version 4.8 was originally intended as a kind of "Version 5 dressed as version 4" release of Mercury. It has several significant new features that were originally flagged as V5 features, but because they are all quite fundamental, in the end I decided that it was fairer to release them in a way that would allow current v4.x licensees to gain access to them without requiring a new license. Over the course of its development, though, v4.8 has ended up taking on the feature list of a major release in its own right.
• OpenSSL All Mercury modules that support secure connections using SSL/TLS now use the industry-standard OpenSSL libraries to do so. Using OpenSSL means greater interoperability with other sites, and allows the use of fully-signed certificates - indeed, Mercury even provides an easy, step-by-step generation process to create the CSR requests needed to purchase or acquire such certificates from online Certification Authorities.
• TCP/IP overhaul The Mercury TCP/IP code, which is the core code that interacts with the Internet, has been totally overhauled. The main benefit of this comes with improved reliability and maintainability, which will make it easier to update the program in future - but you may also notice Mercury handling connections rather faster than in previous versions as well.
• Completely rewritten help system Back in the days of Vista, Microsoft ceased supporting the ageing but functional WinHelp system, but failed to replace it with anything satisfactory (HTMLHelp, in particular, could not be used if the help file was installed on a shared volume, as Mercury frequently is). I finally completed my own help system in time to use it to host a completely reworked Mercury help file for this release. The new help system is up-to-date, consistently formatted, and much more usefully presented than the old version; it will also run properly no matter where Mercury is installed, or on what version of Windows it is running. The new system has a comprehensive table of contents and index, with free-text searching planned for future releases.