Linking from a Note to a Websphere portal page

Hi,

imagine the following situation:

Someone receives a Lotus Notes Mail which contains a link to a certain Websphere Portal page.

When the recipient clicks on the link, he (or she) should be forwarded to that page.

Two scenarios are possible:

1.The user has to login at the Websphere Portal and is then forwarded

2.The user is immediately forwarded and does not need to login

How can both solutions be realized ?

For the second solution, perhaps SSL certificates or the exchange of LTPA tokens might serve as a solution ?

I am looking forward for any ideas.

Thanks.

Andreas