Right, I suspect this will be one where someone points out something really obvious and makes me look like an idiot, however:
Student in three sites only gets digest from announcements despite settings enabling single and digest.
Messaging settings all look ok
Forums all look ok in sites.
Gets single.email when I message or post announcements in a test site ie not these particular sites.
All (by all accounts) other students get single emails in these sites. I enrolled as student in sites and get single emails from annoucements with same settings as him.
Logs show.emails going out via Moodle server and via SMTP server, nothing getting blocked.
Nothing being filtered in email client - I've looked myself.
Have changed email.from Gmail to uni student account
Prefs in db look ok
Have reset prefs several times.
Have assembled an ikea wardrobe twice
Ok, last one I couldn't do.
3.1.6