remove duplicate addresses from addressbook?

Dave Stevens via Users <[email protected]>
Newsgroups gmane.mail.sylpheed.claws.general
Message-ID <20220215131257.26905087@DaveS-NadinaAspire>
I have amalgamated some address books into a single file and there are
more duplicates than I can manually edit out. Is there some tool I can
use for this? I'm thinking of the eliminate duplicate messages tool,
something like that.

Dave
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