Hi Chris, > The issue is its not just this one particular mailbox, this just > happened to the first one I checked. This is happening for about 15 > different domains we host, all with different mailboxes and they are > all different customers. The issue started happening about the same > time (+- 30 minutes from each other) on all of them as well - I > don't think this is anything to do with what the customers have > setup. I have tried contacting a couple of the customers but they > have no clue what they have setup, they will check in with their > tech to see. I've followed up with my customers who had this issue. It seems they had Oulook.com checking their email accounts via POP3, this had been setup for some time (years) and they hadn't touched or changed it recently. As the customers had since migrated to using IMAP and a local client, they disabled this in the Outlook web interface and normal bandwidth consumption resumed [0] with no issues of POP3 bandwidth usage since. HTH. Joseph [] https://www.dropbox.com/s/vl9kct0l744hlei/Screenshot%202016-05-09%2020.45.42.png?dl=0
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