Outlook 2003-Sending' reported error 0x800CCC78 - 553 Authenticati

[sunlitsand]

Why is Outlook 2003 using the 'pop' server for 'sending' now? Shouldn't be
using the 'smtp' server? How do I get Outlook to use the 'smtp' server? All
was working correctly until I installed these updates-see below:

Security Update for Microsoft Office Outlook 2003 (KB945432), Installation
date: ‎3/‎19/‎2008 11:07 AM, Installation status: Successful, Update type:
Important

Update for Outlook 2003 (KB943649), Installation date: ‎3/‎19/‎2008 11:05
AM, Installation status: Successful, Update type: Important

Office 2003 Service Pack 3 (SP3), Installation date: ‎3/‎18/‎2008 4:28 PM,
Installation status: Successful, Update type: Important

ERROR MESSAGE:
Task 'pop-server.'domain'.rr.com - Sending' reported error (0x800CCC78) :
'Unable to send the message. Please verify the e-mail address in your account
properties. The server responded: 553 Authentication is required to send
mail as <my email address>'

 

[neo [mvp outlook]]

Assuming you are wondering about the display text of "Task
'pop-server.'domain'.rr.com ", thats normal. Outlook always uses the name
of the account.

As for the error message, it just means that the SMTP server wants you to
authenticate first to send e-mail. This could range anywhere from checking
your POP3 mail first to ensuring that you have configured the mail account
in Outlook to authenticate to the SMTP server using the same user
id/password you use to access the pop3 server.

 

[nitin0037]

Why is Outlook 2003 using the 'pop' server for 'sending' now? Shouldn't be
using the 'smtp' server? How do I get Outlook to use the 'smtp' server? All
was working correctly until I installed these updates-see below:

Security Update for Microsoft Office Outlook 2003 (KB945432), Installation
date: 3/19/2008 11:07 AM, Installation status: Successful, Update type:
Important

Update for Outlook 2003 (KB943649), Installation date: 3/19/2008 11:05
AM, Installation status: Successful, Update type: Important

Office 2003 Service Pack 3 (SP3), Installation date: 3/18/2008 4:28 PM,
Installation status: Successful, Update type: Important

ERROR MESSAGE:
Task 'pop-server.'domain'.rr.com - Sending' reported error (0x800CCC78) :
'Unable to send the message. Please verify the e-mail address in your account
properties. The server responded: 553 Authentication is required to send
mail as <my email address>'