Hello,
The Netweaver trials(7.02, 7.03) from store.sap.com aren't sending links via email at this time.
We are aware of the problem and have mentioned it to the relevant departments. Keep an eye on this page to see when this known issue has been resolved.
There are cloud trials of newer versions that are available through AWS, information on which can be found in the developer section of SCN.
Sincerely,
Gabriel
