We've just been notified by a user about a potential problem with Yahoo email accounts - if you're trying to sign up with a Yahoo account or wondering why you're not getting any other email notifications, it appears emails sent to that provider are mysteriously vanishing after reaching the Yahoo mail servers.
We've hit their contact page to try and chase this up and will see what happens (past experience trying to contact mega-companies for support has not exactly been positive).
Posted 01:31pm 19/11/08
Posted 03:15pm 19/11/08
In this case they're getting accepted by their SMTP server then they just vanish.
Posted 10:59am 20/11/08
Posted 11:06am 20/11/08
One day they all stopped being delivered with the SMTP response from Yahoo that the mail is being deferred. After going through their support (which was pretty quick and helpful surprisingly) they explained it's just part of their spam blocking technique.
If they register too many connections from the same /24 then they will defer all mail connections. The tech guy said 99% of spammers will get that defer message and then never try again whereas legit operations would do the right thing and defer the delivery for 4 hours or more and then send again and which by then the email gets delivered.
Sure enough after a few days all the mail held up on our MTA for yahoo started delivering through to them.
Posted 11:15am 20/11/08
Posted 11:22am 20/11/08
Posted 11:23am 20/11/08
we do it too
Posted 10:25am 21/11/08
Posted 10:59am 21/11/08
gmail! way of the future!
Posted 03:12pm 21/11/08
Posted 01:38pm 24/11/08
Posted 01:44pm 24/11/08