Best way of merging mbox files

[Joseph Tam]

On Thu, 29 Nov 2018, Ruben Safir wrote:

> aside from cat?

"cat" is fine if you're OK to have all your message in block sorted
(as opposed to globally) sorted order.  I think I made that plain in
my writeup.

Most mail readers will sort by the order in which it appears in
the mailbox.  If you want it time order (i.e. newest first/last),
and the mailbox is not sorted this way, you'll incur the overhead
of sorting it each time you have an index view of your message
(unless your mail reader caches these things).

Joseph Tam <jtam.home at gmail.com>