Membership only sent account details to user without verification code

When a user register in my site, the user assigned free membership as the subscription and an email is sent to the user. However in the past, I think it was membership 3.4.0 which sent verification email to the user where now I have 3.4.2 which sent only user account details without verification code.

This is a major problem for my current development as if user cannot verified by email then the account will never get activited. Please advise how this can be fixed.