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E-Mail Dovecot

de-duplicate messages

Count duplicated messages for mailbox:

doveadm -f table fetch -u user@mailbox.org \
  hdr.message-id mailbox INBOX | sort |uniq -c | sort -k2nr | \
  awk '{printf("%s\t%s\n",$2,$1)}END{print}'

De-duplicate based on the message-id (arg -m):

doveadm deduplicate -u user@mailbox.org -m mailbox INBOX