Faster way to move emails from one folder to another?

[John White]

I have been using "message>move message to."  Takes 
forever. I understand there may be a faster way.  Would 
appreciate any info about this possible alternative.

I have thousands of emails in my in inbox (kmail2, pop3, 
debian buster).  I moved all the 2018 emails to a new folder, 
inbox-2018.  Now I want to do same with messages received in 
2017 but don't have another weekend to spare.

John 
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