Group email & error 5551

B

Bill3

I have experienced a recurring problem: I send an email to a group,
with addresses suppressed, and eventually get an error message:

"Mail could not be sent using [my email account] Not our customer.
Error: 5551"

The email stays in the Outbox and does not move to the Sent folder.
Other emails to groups before and after this one worked as they should
and I have checked the email addresses for typos, etc. I am using
Entourage X and Mac OS 10.3.9.

I can find no way of figuring out who in the group successfully
received the email and who did not.

Any thoughts?

Bill
 
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