In Exchange 2007 OWA, I need to broadcast one messge about 1,000 emails to clients. I put their email list in bcc and got the error message: #550 5.5.3 RESOLVER.ADR.RecipLimit; too many recipients ##. The complete error message also had: "This message has too many recipients. Microsoft Exchange will not try to redeliver this message for you. Please try resending with fewer recipients, or provide the following diagnostic text to your system administrator." Any ideas? This is not spam.Jack

Check this out and set the values as per your requirement http://technet.microsoft.com/en-us/library/bb310760(EXCHG.80).aspxRaj