I need help.  I can not send or receive email on my android phone.  It says authentication failed.What do I need to do? 
What exactly does this error message mean?  What do I need to do to achieve authentication?
I have the same issue with Samsung Infuse.  It updated the Hotmail app to Outlook.  Now will not authenticate for either my hotmail.com or msn.com account.  Please review my account. Thanks for your time.
I am using MS Outlook on my Macbook Pro and I receive the following message every time I initiate an outgoing email:  The server for account "Live" returned the error "5.0.0 Authentication Failed." Your username/password or security settings may be incorrect. Would you like to try re-entering your password?"  I can forward or reply to any email I receive, I just can't initiate one. Anyone have any idea how to fix this?
When i ask Outlook to send/receive, this message appears and no e-mail is added to my inbox.  "Authentication failed because Outlook doen't support any of the available authentication methods.

I'm quite certain the difficulty is in the settings.  Can anyone help?

Ron
Original Title: "Outlook for Mac version 14.2.4"

I can't send emails it show authentication failed because Outlook doesn't support any of the authentication methods any error code 17983
Every so often i get a pop up window in Outlook that says "Mail could not be received at this time" with a message saying that authentication failed due to invalid credentials.  However, it keeps sending and receiving email just fine, these annoying messages keep popping up every second or two and prevent me from accessing email.  I've tried resetting my password, but that doesn't stop them from coming.  Has anyone else had this problem, and how do I stop it from happening?

Thanks,
Sharon
I'm installing a program on my computer and it's asking what the authentication and the SSL/TSL are for my email,(hotmail), I don't know what these are or where to find them. Can anyone help please?
My Outlook for Mac was showing the message "Authentication Failed"  I tried reloading outlook and have done all the available updates, still no joy.  Outlook appears to load but with no viewing panes. Can anyone pleas give me some clues.
Original Title: Outlook 2011 for Mac
I have three email accounts the gmail account works just fine but I can't get the bellsouth and att accounts to work in outlook.  When I try to send receive I keep getting an auth error.  I have deleted these accounts and re-installed them several times and they still don't work.  Is there something else I need to do?