Caveat: I use an earlier version of Evolution that uses mbox files and so unfortunately I don't have any maildir files to test this with.
Originally Posted by cforput
Looking at "maildir2mbox" from https://github.com/jooooooon/maildir2mbox this seems to contain two scripts and a README file, rather than a program. When you download and unzip this file the README states:
Looking at the maildir2mbox script, it seems to me that you should edit line 42 to change the path to the location you have unzipped file "dateRfc3339ToMbox.pl" to. e.g.
maildir2mbox > /path/to/your/destination.mbox
Note: you must make sure that the path to the accompanying script "dateRfc3339ToMbox.pl" is correct in the maildir2mbox script.
edit to show
DATE=$(my path to/dateRfc3339ToMbox.pl "$DATE")