When a user subscribes to my newsletter via their email address, using php, how would I send them an \'Activation Link\' via email to confirm it is their email address and n
Personally I would add there details to the database and have a fields called "active" then when they click the activation link all you need to do is update this one field.
You could also have a "This was not me" link in the email and if they click this you remove all there details.