When I ran mmv '/var/lib/gromox/user/*/*/eml1*' '/var/lib/gromox/user/#1/#2/eml/#3', I receive this error message:
/var/lib/gromox/user/*/*/eml1* -> /var/lib/gromox/user/#1/#2/eml/#3 : no match.
Nothing done.
When I browse to the /var/lib/gromox/user directory, I see multiple additional directories, each named a numeric value. Then inside each of those, another directory named as a numeric value. Inside that subdirectory is another named "eml" (no numeric value after the "L").