[MlMt] a message confuses MailMate on one computer

[Steven M. Bellovin]

I run MailMate on three computers.  On one of them, a particular message 
seems to hang MailMate; on another, it's fine.  By "hang" I mean that 
when I select the message, I get the spinning beach ball and Activity 
Monitor shows MM as not responding.  It isn't chewing up CPU time or 
doing network I/O; it's just sitting there hung.  Any suggestions?  All 
machines have the current non-beta version of MailMate on El Capitan.  
Killing/restarting MailMate doesn't help.


         --Steve Bellovin, https://www.cs.columbia.edu/~smb