In a thread on meta stackoverflow I noticed that it is possible to set up to be notified to responses to a post via email by checking a check box. However I am not seeing the checkbox when attempting to make a new post and I have tried stackoverflow, meta stackoverflow and meta stackexchange. I am using chrome 40.0.2214.115 m and see the following when I try to make a new post. I have also checked in Firefox 35 and I don't see the checkbox there either. I am using Google as my openid provider if that makes any difference.
The post on meta stackoverflow has the following image
Here is my email settings (note I blanked out the email address that was in there to hide it)