+ **count**
+ Print the count of how many times was the address
+ encountered during search.
+
+ Note: With this option, addresses are printed only after
+ the whole search is finished. This may take long time.
+
+ ``--deduplicate=(no|mailbox|address)``
+
+ Control the deduplication of results.
+
+ **no**
+ Output all occurences of addresses in the matching
+ messages. This is not applicable with --output=count.
+
+ **mailbox**
+ Deduplicate addresses based on the full, case sensitive
+ name and email address, or mailbox. This is effectively
+ the same as piping the --deduplicate=no output to **sort |
+ uniq**, except for the order of results. This is the
+ default.
+
+ **address**
+ Deduplicate addresses based on the case insensitive
+ address part of the mailbox. Of all the variants (with
+ different name or case), print the one occurring most
+ frequently among the matching messages. If --output=count
+ is specified, include all variants in the count.
+