Can't Send Emails To Large Batch Of Recipients, Message Rejected
I could use some major help in troubleshooting an email issue that we are having. Our setup is a one month old SBS 2011 server with Exchange 2010 and all relevant updates and service packs. We are running Symantec Mail Security as our Spam Application. We have no trouble sending emails to singal address or a even a few address for that matter. However, when we have an email that has a few hundred to a 1,000+ contacts the large majority of them get rejected. I have checked to ensure we aren't blacklisted so I am not really sure what is going on. Our Exchange server is setup plain stock except I have changed all message attachment and size limits to 99MB. When we send these large messages we aren't attaching any kind of document so this isn't an issue either. How would you go about troubleshooting this issue. The exact error message we receive is below. XXXXXXXXXXXXXXXXXXXXXXXXXXXX.com rejected your message to the following e-mail addresses: 'John Smith' (john@smith.com) XXXXXXXXXXXXXXXXXXXXXXXXXXX.com gave this error: Unable to deliver to <john@smith.com> Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or other restriction may be preventing delivery. We desperately need to be able to send to large batches of clients at a time without issue. Thanks so much for all your help in advance!
October 11th, 2012 4:43am

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