+ /* NOTE: the address is verified as a recipient, not a sender. This is
+ perhaps confusing. It isn't immediately obvious what to do: we want to have
+ some confidence that we can deliver to the address, in which case it will be
+ a recipient, but on the other hand, it will be passed on in SMTP deliveries
+ as a sender. However, I think on balance recipient is right because sender
+ verification is really about the *incoming* sender of the message.
+
+ If this code is changed, note that you must set vopt_fake_sender instead of
+ vopt_is_recipient, as otherwise sender_address may be altered because
+ verify_address() thinks it is dealing with *the* sender of the message. */
+