I only want to calculate how much space the mailbox has, I don't want to migrate. Is there a way to know the space with imapsync?

Thank you.

  • Why do you specifically want to use imapsync to do this?
    – womble
    Apr 7, 2020 at 6:03

1 Answer 1


Use --justfoldersizes and the same account as source and destination.


Q. How can I know the size of all folders before launching a sync?

R. Use --justfoldersizes option.

With the --justfoldersizes option, imapsync evaluates and displays the 
folders sizes on both sides and then exits without doing any transfer.

  imapsync ... --justfoldersizes


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