[whpalmer4]

Give Amazon a web sync address directly (you can generate additional addresses from the OSS webpage). When they send you any mail, including any sort of verification, you'll get it in OmniFocus. If there's a link to click to verify the address, you can just copy it out of the OmniFocus action and paste it into your web browser's URL field (unfortunately, links in emails that pass through this feature are not yet turned into clickable links in OmniFocus, although you can select the tet of the link, right-click and select Make Link from the popup menu).

Alternatively, use the old Mail processing feature in OmniFocus and Mail to send such emails into OmniFocus. See the built-in help for Processing Mail.