I'm bringing my history as a domain-atrix to the table here.
Spamhaus is one of the major providers who maintains blacklists; the domains-'n'-more outfit that I worked for, a little shop based in Scottsdale, AZ, subscribed to their blacklists to filter spam before it hit their users' inboxes. Now, that was only for people who had email hosted through them or forwarded through their mail servers, not everybody who had a domain there had email through them, but that is still a substantial chunk of their domains who would not be getting LJ email. And other places subscribe to them as well.
So people who have not been getting their notifications since a certain amount of time (however long their email provider took to retrieve fresh records from Spamhaus) after that record went in, that is the first cause I would think of.
Diagnostics for that would be pretty easy: get in touch with your email provider (well, first track down where it is, if you're not sure) and ask if they use a Spamhaus blacklist. If so, boom.
This will absolutely affect emailed notifications.
I don't know what effect this would have on inbox notifications, because I don't know how much the effects of the blacklist are gumming up LJ's email servers, and what sort of effect a gummed-up email server would have on the inbox notification process.
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mmmag
no subject
Date: 2011-03-11 04:25 am (UTC)Spamhaus is one of the major providers who maintains blacklists; the domains-'n'-more outfit that I worked for, a little shop based in Scottsdale, AZ, subscribed to their blacklists to filter spam before it hit their users' inboxes. Now, that was only for people who had email hosted through them or forwarded through their mail servers, not everybody who had a domain there had email through them, but that is still a substantial chunk of their domains who would not be getting LJ email. And other places subscribe to them as well.
So people who have not been getting their notifications since a certain amount of time (however long their email provider took to retrieve fresh records from Spamhaus) after that record went in, that is the first cause I would think of.
Diagnostics for that would be pretty easy: get in touch with your email provider (well, first track down where it is, if you're not sure) and ask if they use a Spamhaus blacklist. If so, boom.
This will absolutely affect emailed notifications.
I don't know what effect this would have on inbox notifications, because I don't know how much the effects of the blacklist are gumming up LJ's email servers, and what sort of effect a gummed-up email server would have on the inbox notification process.