I doubt if it is anything personal. They do this periodically for maintenance. I’ve never been notified; it just happens.
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On Aug 25, 2016, at 10:44 AM, Mark Fletcher <firstname.lastname@example.org> wrote:
Around 3am pacific this morning, Yahoo Mail started deferring email from us. According to their website, the deferral should last around 4 hours, and indeed it does look like they're starting to accept email from us again. No messages should be lost, just delayed.
I have no insight into why they did this. But I have just turned on FBL processing again for the yahoo.com, att.net and sbcglobal.net domains (in addition to the already resumed aol.com).