Comment 146 for bug 357864

(In reply to Ben Bucksch from comment #129)
> > * If you really want to pref this feature away, I think the best way would
> > be a checkbox in "Account Settings..." | "Manage Identities...".

> So, the presence of the "customize" option would depend on which identity you had selected?

No, I'd make it so that only one identity can have this checkbox checked (in Account Settings), and that one identity would always be used for custom email addresses.

That said, I do *not* think that we should pref this away. I think Neil's patch was just fine.
But I can see the argument.

Personally, I'd just add a one-time message that explains the feature and warns people.
"Nnormally, you should add your email addresses in Account Setup.
This feature here is for users who want to use a custom author email address depending on their recipient, for example <email address hidden> or <email address hidden>.
It is only for your own email addresses. Impersonating other people may be subject to punishment by law."