454 relay access denied

[Wayne62]

I have all of a sudden started to get a problem that comes up as a protocol
error 454 relay access denied and the email address i am trying to send to
and will not let me send to this address and it is the only address it will
not let send to can anyone help me

 

[Lanwench [MVP - Exchange]]

In

I have all of a sudden started to get a problem that comes up as a
protocol error 454 relay access denied and the email address i am
trying to send to and will not let me send to this address and it is
the only address it will not let send to can anyone help me

Can you send to this address from, say, a Hotmail/Yahoo/other account?
If this is the only address you're having trouble sending to, it doesn't
sound like it's your particular problem - although you might want to check
with your ISP or whomever runs the SMTP server you connect to if you are
able to send to all other addresses successfully.

Also, when you post in here, always include your version, SP level, and mode
(if applicable) of Outlook - you can find this in Help | About in Outlook.
Also mention your mail account type and any other pertinent info.