I "upgraded" from v2.6.? to v2.7.3.  By "upgrade", I mean "copy all files to a different computer, then run the installer".  e-mail messages received from my v2.6 instance look nice.  The messages look like HTML tables with blue and green coloring.  My v2.7 instance appears to send plain text.  But, when I forward the v2.7 message, the nice HTML tables appear again.  Is there an e-mail formatting setting that I need to change?