MS Exchange 2003 error for a public folder

Hi everyone,

I’m sorry if I’m posting in a wrong place but, I have a problem with a public folder on Exchange 2003 that can’t receive e-mails. The sender receive a delivery message that contains the following error:

The message reached the recipient’s e-mail system, but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator.

I can’t found any difference between this public folder and another that works. This PF already received e-mails correctly in the past… I test and check many things but nothing to do. It won’t work.

Anyone could give me a tip ?

Thank a lot !
Kévin