> it's impossible to achieve the same level of one-timeness with RSS.
No it's not (not that I can really think of why you'd want that). Generate user-bound rss feed urls with GUIDs or a signed "start date" that provides only entries since that date. That can also allow you to track how many times that url gets retrieved and eventually block it if it's too many.
Or have the rss reader only send an excerpt and have people auth before they access the content on your website.
>most importantly, if I don't set up an archive of all the newsletters, then only the people who subscribed will ever be able to read it.
On the other end once the email left your box, you don't control it anymore, and I can give you a well hidden hack that allows someone not subscribed to read it if they know someone subscribed.
No it's not (not that I can really think of why you'd want that). Generate user-bound rss feed urls with GUIDs or a signed "start date" that provides only entries since that date. That can also allow you to track how many times that url gets retrieved and eventually block it if it's too many.
Or have the rss reader only send an excerpt and have people auth before they access the content on your website.
>most importantly, if I don't set up an archive of all the newsletters, then only the people who subscribed will ever be able to read it.
On the other end once the email left your box, you don't control it anymore, and I can give you a well hidden hack that allows someone not subscribed to read it if they know someone subscribed.