Configuration CF7 and Gmail discussion

Hello there,

I have a problem with receiving emails that pass through Contact Form 7 to Gmail.

All emails sent from the form are correctly sent and received. On the other hand, since the e-mails go through my OVH server, Gmail understands that it is a single interlocutor and therefore combines the e-mails received in the same discussion.

It bothers me, because I receive reservations from my site through one and the same discussion (it depends if there are several reservations in the same day)

Do you have any idea how to avoid this?

I can send you some screenshots about the gmail discussion and the configuration CF7.

Thank you by advance,
Regards