From what I've read, a lot of people are having this problem. Seems to be a new EAS protocol change MS pushed to their servers.
Why is Hotmail not syncing correctly on my mobile device? - Microsoft Answers
Hotmail Exchange Active Sync (EAS) broken since May 17 - Microsoft Answers
On my EVO LTE, I can't send email. Sync/push email works fine but I've not been able to send outgoing email except for a few days when I deleted my account and set it up again. It worked for a few days and stopped. Occasionally I get the "sync failed" or "problems" notification.
I see this when I do a logcat:
-----------
I/global (23807): In close() at SocketHttpClientConnection
I/global (23807): call socket close in SocketHttpClientConnection, socket=SSL s
ocket over Socket[address=/157.56.121.231,port=443,localPort=58516]
W/EASRequestController(23807): [Acc 5]com.htc.android.mail.eassvc.core.SyncExcep
tion: Redirect required
W/EASRequestController(23807): at com.htc.android.mail.eassvc.core.SyncManager.
getHttpStatusError(SyncManager.java:482)
W/EASRequestController(23807): at com.htc.android.mail.eassvc.mail.MailSender.s
endMailProtocol140(MailSender.java:448)
W/EASRequestController(23807): at com.htc.android.mail.eassvc.mail.MailSender.s
endMail(MailSender.java:834)
W/EASRequestController(23807): at com.htc.android.mail.eassvc.core.SyncManager.
sendMail(SyncManager.java:8711)
W/EASRequestController(23807): at com.htc.android.mail.eassvc.core.EASRequestCo
ntroller$MailSendRequestController.run(EASRequestController.java:2392)
D/CursorWindowStats(23807): Allocate Cursor Window larger than default value, si
ze: 4194304, default:2097152
D/CursorWindowStats(23807): Allocate Cursor Window larger than default value, si
ze: 4194304, default:2097152
D/CursorWindowStats(23807): Allocate Cursor Window larger than default value, si
ze: 4194304, default:2097152
E/EAS_NOTIFI(23807): sendmail fail
D/CursorWindowStats(23807): Allocate Cursor Window larger than default value, si
ze: 4194304, default:2097152
D/CursorWindowStats(23807): Allocate Cursor Window larger than default value, si
ze: 4194304, default:2097152
D/SendErrorNotification(23807): accid=5 ,protocol=4, mOutBoxId=66, mNum=1
D/NotificationFlashLightUtility getEmail(23807): load fail~~~~~~~~~~
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I've tried both "Hotmail" setup and setting it up as an exchange service with m.hotmail.com. I have an MSN.com email.
I think it also has to do something with the client - My EVO 3D works flawlessly. Sends and syncs email without any problems. Never once have I see it not work.
I'm now hoping for an HTC update which sorts out this incompatibility.