Use the Stats Sharing addon to create links you can share with other folks. That way they don't have to log in to your account, to see your newsletter metrics! And you can always disable individual links after you've shared them, for added security.
That's it! Now you'll find a Share button on all stats pages. It looks like a small arrow, swooping down and to the right. The button is in the top right corner of all stats pages, in between the % button, and the pencil icon to edit the campaign.
Click the Share Stats arrow button to generate a unique link to the stats on that page. The link will appear in an overlay screen, already highlighted for you. Copy this link, and paste it in a message or post, to share it with others on your team.
You can share this link with anyone you want to share the stats of this campaign with. Anyone who has the link can view the stats, only -- they will not be able to view or export any subscribers, or do anything else in your account, at all.
At any time you can return to the Stats Sharing page under Add Things to disable any shared URLs.