"530 Authentication Required" -> please advise!

[Andreas]

Your message did not reach some or all of the intended
recipients.

Subject: N/A
Sent: 3/11/2004 1:12 PM

The following recipient(s) could not be reached:

'(e-mail address removed)' on 3/11/2004 1:12 PM
530 Authentication required

?????

This message I receive frequently, independent from e-
mail address or computer I use. Some days it occurs, then
almost no e-mail is sent, some other day there is no
problem at all.

Anybody any idea???

 

[Jeff Stephenson [MSFT]]

See
http://office.microsoft.com/assistance/preview.aspx?AssetID=HA011128331033
for a discussion of this and what to do about it.