Read Proof Email Address using Javascript (urgent, Verizon)

Hi, we need your help.

We are trying to proof send our campaign.

We have different SL versions of the content depending on the targetData.segmentCode.

1) Our current method of proofing:

We read the proof email address (using Javascript on the subject line) and depending on how the email address is structured we force the different SL versions.

This allows us to force different SL versions during proofing using the email address format.

This works fine on our sandbox account because we can read the proof email address with JavaScript using this variable: recipient.email

The problem is on our client's account (Verizon) this variable does not output the proof email address during proof sending.

They seem to import their proof addresses using this method

On the Verizon case we have not found a way to output the proof email yet using JavaScript. What is the way to do it for the import method Verizon is using above?

2) Maybe a better way to proof would be using the segmentCode to force the different versions.

Is there a way to use the segmentCode during proof sending to force different versions (especially given that proof email addresses are not assigned a segment code during proof sending?)

If you may, could you give us an answer for both 1 and 2.

thanks so much,

alex