Batching notification emails
Title:
Batching notification emails
Area:
email notifications
Summary:
Combine multiple email notifications into a single email based on temporal and topical similarity.
Description:
It's pretty common for someone to grant access to user X, subscribe to X, and maybe even send X a private message explaining who they are, all at the same time. As it is, I would get three separate emails if that occurred. I suggest batching up all similar email notifications that are generated within a given time period (say half an hour?) and combining them into a single email. "Similar" could just mean involving the same user (in the above example, I would get one email saying "X granted you access; X subscribed to you; X sent you a message") or even combining multiple subscription notifications into a single email, for all those really popular people out there.
This suggestion:
Should be implemented as-is.
8 (17.8%)
Should be implemented with changes. (please comment)
7 (15.6%)
Shouldn't be implemented.
21 (46.7%)
(I have no opinion)
7 (15.6%)
(Other: please comment)
2 (4.4%)

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(FTR, you can turn off e-mail notifications some of your example things separately, if you're getting too many emails - I get emails for comments and circle adds but not PMs, for example, so that version of grouping wouldn't even apply to me.)
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+1
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Digest for *all* notifications, with options for frequency. See mailman again for options and behaviour: http://www.list.org/mailman-admin/node19.html
Note that this includes options for digest type - MIME multipart/digest or RFC1153 plaintext digests
The only type of grouping option I might see as a useful thing to have would be "separate digests for each notification type" or "digest all notifications".
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In addition, this may cause drama if notification emails for the same comment are deferred for one user (eg, the entry author) and not another (eg, the flamebait commenter).
FYI
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