double opt in feature

Hi @adeelraza_786,

Greetins and thanks for your question! Were you asking about opting in to a mailing list?

If so, you could try using Remote Pings to automatically subscribe users to a mailing list. The following has some initial details that could help:
http://premium.wpmudev.org/forums/topic/pings-on-membership#post-102518

And more specifics here surrounding MailChimp as a solution:
http://premium.wpmudev.org/forums/topic/pings-to-mailchimp

Is that along the lines of what you were asking about?

Please feel free to let me know if I’ve misunderstood or if you have questions. 🙂

Thanks,
David