BBEdit 8.5 (a Mac text editor) has just been released.
There's a BBEdit CLM (codeless language module) for Exim config files on
the Exim wiki
<http://www.exim.org/eximwiki/ConfigurationFile>
BBEdit 8.5 adds code folding, and I've made some notes on the Wiki
explaining how to add comments to your Exim config which will let you use
the code folding features with that language module.
There's also a tip on searching Exim documentation from inside BBEdit.
--
Ian Eiloart
IT Services, University of Sussex