On Tue, 26 Nov 2019 15:21:33 +0100, Stephane wrote in message
<a7577d41-7417-7d79-43ba-55995de6f5ba@???>:

> Arnt Karlsen
> >        To split up a digest one usually uses:
> >               formail +1 -ds >>the_mailbox_of_your_choice
> >        or
> >               formail +1 -ds procmail  

>
> Hi, this is very interesting, but I can't see how it may be used to
> split a specific digest in my Thunderbird

..you can't (AFAIK), you do it outside your MUA, with e.g.:
'cat $DIGEST |formail +1 -ds procmail ', then chk your MUA
for the "new messages" from your $DIGEST

--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.