Can't send message to distribution list

[The Undertaker]

Dear All,
I am trying to send a message to a distribution list (about 20 email
addresses) using Outlook 2003. Unfortunately every time I try I get an
error message. Sender is "System Administrator" and the message:
"Your message did not reach some or all of the intended recipients.
The following recipient(s) could not be reached:

(emailaddress1) on 3/27/2006 4:28 PM
452 Error: too many recipients.

(emailaddress2) on 3/27/2006 4:28 PM
452 Error: too many recipients.

(emailaddress3) on 3/27/2006 4:28 PM
452 Error: too many recipients.

etc.

How can I resolve this problem? Anything wrong in my smtp configuration?
Sending to a single email address is no problem.
Thanks!
The Undertaker

 

[Vince Averello [MVP-Outlook]]

Sounds like your mail server isn't happy with the number of recipients you
put on the item. Check with your mail administrator or ISP to see what the
limits are.

 

[The Undertaker]

I have tried another smtp server and now I am getting a 500 error on all
email addresses

 

[Vince Averello [MVP-Outlook]]

The other server is probably not on the same network as you so it's giving
you relay errors.