Sometimes we might just want to send out a newsletter instead of a daily feed. There are a few services letting users create these newsletters from feeds. This gives the subscriber a few options when receiving your feed, rather than just daily.
www.nouri.sh – lets you send up to 5000 emails per month for free, though with only 5000 emails it goes rather quick, unless you have a small subscriber list.
Zookoda – I’d recommend this most of all simply because it’s completely free and lets you schedule posts so you could send out a weekly newsletter. On the downside Zookoda subscribers don’t show up in FeedBurner stats.