Thank you for the responses to the call for beta testers. We will notify those who have been accepted.
We expect this feature to be available to all by the end of August.
An error occurred while saving the commentLuke Stevenson commented
Surely you could simply have a flag on an Account which sets whether the plus can be used as a break between the user portion of an email and an optional flag portion.
It's not as though you are making this change for hotmail, where "user+flag" may be an old username.