Email relaying blocked

[Guest]

I have Outlook 2003. Recently when sending emails, I often get a message
from the “System Administrator†generated, I presume, by Outlook that the
email was undeliverable. It further states, in the following truncated
statement, that “550 relaying blocked, read new mail, add 11.11.11.11 to
forwarding or enable smtp authentication in you.†The 11.11.11.11 is one of
my static IP addresses I bought from my ISP; I substituted the real one for
the one shown here. I called my ISP and they didn’t know what the statement
meant. What is meant by “550 relaying blocked†and “add 11.11.11.11 to
forwarding�

 

[Vanguard \(NPI\)]

I have Outlook 2003. Recently when sending emails, I often get a message
from the "System Administrator" generated, I presume, by Outlook that the
email was undeliverable. It further states, in the following truncated
statement, that "550 relaying blocked, read new mail, add 11.11.11.11 to
forwarding or enable smtp authentication in you." The 11.11.11.11 is one
of
my static IP addresses I bought from my ISP; I substituted the real one
for
the one shown here. I called my ISP and they didn't know what the
statement
meant. What is meant by "550 relaying blocked" and "add 11.11.11.11 to
forwarding"?

Configure the e-mail account to authenticate to the SMTP server. Make sure
the SMTP server that you use is either within your own domain (and your ISP
permits your account to pass SMTP traffic across its network to some
other-domain SMTP server) or you use your ISP's own SMTP server (since many
will block SMTP traffic that targets any other host, especially off-domain
SMTP servers).

 

[Guest]

Read the following;

http://office.microsoft.com/en-us/assistance/HA011128331033.aspx