Yes,

Notmuch considers any email files with the same message-id header as
being the same message so won't show you multiple versions of the same
email, (unless you're specifically asking for it to with something like
--output=files).

In normal usage I never worry about the duplicates I get from mailing
lists, etc.

I hope you'll find notmuch very useful.

Have fun!

-Carl

On Wed, Dec 11 2019, Alan Schmitt wrote:
> On 2019-12-11 16:33, David Edmondson <dme@dme.org> writes:
>
>> How you decide to deal with multiple results is really up to you 
>> - in my
>> case I move/delete all of them (except that I don't actually 
>> delete
>> anything).
>
> This is probably the key: I'm used to file-based MUA that will 
> show me
> duplicates. If notmuch hides them from me, I could just ignore 
> that they
> exist (it's not like it's taking too much space anyway…)
>
> Best,
>
> Alan
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