Threaded views

[Kyrome0202]

HellO!

For Threaded Views on Roundcube, is it possible to manually add a received email to a current threaded list?
Basically I have mails that are threaded as expected. But then these newly received ones does not fall under the same thread, even though they are of the same subject. The ones that are threaded have their subject displayed as
Re: Enquiry

while the newly unthreaded ones have theirs displayed as
Re: Re: Enquiry