Complex sentence: While this first version (v1) was still very limited in its features the successor version (v2) introduced much more advanced features so that the 2.2 version was then also rated as the best e-mail client for Amiga computers back in 1998.
Split into simpler sentences: While this first version (v1) was still very limited in its features the successor version (v2) introduced much more advanced features. The 2.2 version was then also rated as the best e-mail client for Amiga computers back in 1998.