Need to verify custom email field to system email field

Hi, is it possible to verify a custom email field that I have created to the main system email field and if so how is it done.
I know that the verify email field can be enabled but it needs to be verified to the system email not the custom one.

Thanks

Edit the email field and under Parameters > Validation enable the verify feature for it. The verify feature is field by field. Aside from that I don't understand what you're asking, sorry.

Sorry for not being clear enough. As mentioned I know that the email fields can be enabled to validate that particular field
but what I am asking is there any way that a custom email field can be validated to the main system email field.

There are up to 4 different membership plans shown at registration and I have had to add a separate custom email field for each membership plan which is controlled as to which membership group and members can view and access it by CB Subs field tabs protect. This can't be done using only the main system email field. It would be helpful if this custom field could be validated to the main system email field to pick up a wrong email address being entered.

Hope this is clearer, thanks.

Only way to do that is CB Query Field or CB Code Field which lets you add custom Query based or PHP based ajax validation to fields. You'd for example setup a query validation to check the value against the email column in _users.

Thanks for your reply Kyle. Can you or anyone else please give me specific instructions as to how to do that? Would be much appreciated.

See the below videos for CB Query Field.

www.youtube.com/playlist?list=PLp0puRITgC7MM9iP9FooKB1qk8f5MLWVp

The videos show the various usages of CB Query Field including Query Validation.