Im using codoforumv2.6(I downloaded it yesterday)

FIRST PROBLEM-

I get these errors when I click blocks in ui. So i'm unable to edit 'link' 'dropdown'

SECOND PROBLEM-

there's no confirmation mail receive when a user register.

THIRD -

How can I mail all registered users at once,like sending newsletter.

Hi,

Which version of Codoforum are you using ?
Can you try reinstalling it ?

there's no confirmation mail receive when a user register.

Do you get any error if you try registering an user or when you click on resend email in the profile page ?

How can I mail all registered users at once,like sending newsletter.

Codoforum does not support this feature.
We will implement it if we get more requests for it.