Notifications about replies and such arrive in my mailbox with considerable delay (many hours), and in apparently random order. I wonder: is it just me, or is something wrong with the discourse notification mechanisms?
We have our settings here configured to send emails 5 minutes after posting a public message and immediately after DMs, but I’m guessing that — as a hosted instance — Discourse Inc either batches up emails and/or staggers sending them out.
Just to confirm: do the times logged in the email headers show that they’re originating with that delay (and then being processed immediately by all intervening servers)?
For me emails usually arrive 5 minutes after a message is posted (unless I’m already in discourse and read the messages straight away, in which case no email is sent), which matches what Matt says.
I was wondering if there was a delay so that edits to your post within the 5 minute grace period for edits are reflected in the email that gets sent. So, it sounds like grace period edits will in fact be reflected in the notification email. 
Thanks all, I guess the delay occurs at my end.