Hi Kelly
I'm having a similar issue. I've also used the server name "pop-mail.outlook.com" which used to work. Now I've used the settings for outlook I've found on https://www.outlook-apps.com/outlook-com-pop-settings/
But unfortunately for both settings I get the following error (different IP in error msg):
[BEGINERROR]
Exception type: OpenPop.Pop3.Exceptions.PopServerNotFoundException
Stack trace:
at OpenPop.Pop3.Pop3Client.Connect(String hostname, Int32 port, Boolean useSsl, Int32 receiveTimeout, Int32 sendTimeout, RemoteCertificateValidationCallback certificateValidator)
at CMS.Newsletters.BounceChecker.ProcessAllEmails()
Message: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 52.97.139.2:995
Exception type: System.Net.Sockets.SocketException
Stack trace:
at System.Net.Sockets.TcpClient.Connect(String hostname, Int32 port)
at OpenPop.Pop3.Pop3Client.Connect(String hostname, Int32 port, Boolean useSsl, Int32 receiveTimeout, Int32 sendTimeout, RemoteCertificateValidationCallback certificateValidator)
[/ENDERROR]