User account activation link

On clicking the account activation link on the gmail, the links opens in https instead of http as shown below.

https://www.google.com/url? l=en&q=http:///examprep.co.ke/auth/activate/62/6b4697131c21afbc3a2a5c0d1bdd11a30fa18fde&source=gmail&ust=1504443142722000&usg=AFQjCNFzF3QaKmDim6_WtKS_9nxqQyfRhg

On other e-mail platforms the link opens fine

http://examprep.co.ke/auth/activate/59/3...ea89e22e57


What could be the problem?

https://forum.codeigniter.com/thread-688...#pid346797 <- stop posting the same problem

http:/// <- this is the problem

show me the base_url and email template.