Hi Alberto,
I have LO 5.2.3.3 on openSUSE Leap42.2 with KDE. Selecting mailmerge
wizard in LO writer there are only 5 steps included. I cannot figure out
what is missing to complete the wizard to 8 steps and being able to send
the letters via email.
There is a new: View > Tool bars > Mail Merge
Ciao - Cor