Given how important newsletters have become to journalism in recent years, it's no surprise that there are a proliferating number of newsletters about journalism. I subscribe to many of them for obvious reasons, and the ones listed below are a personal set of recommendations — these are the ones I personally find useful, and which you might, too.
These are newsletters produced by individuals, doing analysis or media criticism.
And, just in case this is your first time on this site, I do this, too…
General Journalism News
These are aggregation newsletters — they do a round-up of useful media news.
Higher-level newsletters: analysis and insight for editor and publisher level journalists:
Community & Social Media
Newsletters that are useful for people working in social, audience engagement or community journalism.
A couple of really handy newsletters on jorunalism-centric SEO
Newsletters for people working in data journalism — or aspiring to.