as it is, this removes the "all" entry completely, if the to address is in AccountManager.is_account?

what you should be doing is, check every address with in the fields in "all" and only remove the address that is being used as From. so that i do not send mail to myself.

further, if i have multiple email addresses, i want to optionally exclude all my addresses. this should be separate from "all" but be a new choice "not mine" or "all except me", this should then check every field again and remove any addresses that match AccountManager.is_account?