I am having the following issue. When I send an email with a number of recipients, it will resend the email to everyone (the email was meant to go to) if even one of the recipients email address is incorrect. This has resulted in some cases some recipients receiving the email 40 plus times. I am unsure what is causing this issue I have check my exchange server from top to bottom cannot see an issue with its setup. I am wondering if anyone out there can help me locate the issue.

Check the outbox to see if the message is stuck, check in OWA too. Is the still issue happening?Sukh

There are a number of different things that can cause this, but luckily they are all fairly easy to fix. 1) The most common cause of this problem is that there are too many items in the Sent folder. It sounds odd, but Microsoft Outlook can only handle a limited number of items in the Sent folder. If the program reaches its limit it cannot move files from the Outbox to Sent. When that happens it will continually resend any email that remains in the Outbox folder. The fix is simple: every once in a while you need to go in and clean out those old sent emails. If you really need to have a record of the emails you sent two years ago, archive them off to an external file so you still have them, but get them out of Sent. While you are at it, also remember to empty the trash. 2) If somehow there are multiple copies of Outlook running. Do you see more than one copy of Outlook in your task manager? If so, try closing all of them and then only opening one. Or, just restart your machine. If you are consistently having the multiple send problem though, this is unlikely to be the cause. 3) If the send/receive interval is very short, like one minute, and you are sending a very large file that takes over that interval to send then Outlook may start sending the email a second time. In this case the fix is to increase the send / receive interval. Note that this is usually only encountered when sending extremely large attachments like photos. 4) Rarely, but it can happen, the installed anti-virus software will scan outgoing messages and corrupt the queue thereby causing multiple copies to be sent. The solution here is to tell the anti-virus software not to scan outgoing messages. This can happen to all email programs, such as Outlook Express, so watch for it. http://www.michaelcarnell.com/outlook-sending-multiple-copies-of-email/

1) The most common cause of this problem is that there are too many items in the Sent folder. It sounds odd, but Microsoft Outlook can only handle a limited number of items in the Sent folder. If the program reaches its limit it cannot move files from the Outbox to Sent. When that happens it will continually resend any email that remains in the Outbox folder. OP does not say what version is being used, but with Outlook 2007 and 2010, that limit must be pretty high. Anyone have an idea? Here James Luo is talking about 20 000 items: http://social.technet.microsoft.com/Forums/en-US/exchangesvrclients/thread/bd466b06-93f2-4298-b320-40f8db62a3d0/Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

On Wed, 21 Mar 2012 22:02:22 +0000, James_MAC1972 wrote: >I am having the following issue. When I send an email with a number of recipients, it will resend the email to everyone (the email was meant to go to) if even one of the recipients email address is incorrect. This has resulted in some cases some recipients receiving the email 40 plus times. I am unsure what is causing this issue I have check my exchange server from top to bottom cannot see an issue with its setup. I am wondering if anyone out there can help me locate the issue. Are all the recipients in your Exchange organization? Are they all on the same mailbox server? If the recipients are in other domains, do you use a SMTP relay server (i.e. a smart host) or do you send e-mail directly to other servers in the target domains? Are you using Outlook with a RPC connection to your mailbox or are you using POP/IMAP and SMTP? It the problem involves external recipients, have a look at the SMTP protocol logs. When this happens do you see a "2xx" status and a normal termination to the message or does the receiving server (or smart host) terminate the connection prematurely? --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Blame it on cached mode :) check if the user is in cached mode, cached mode has been known to repeatedly send emails among a host of other issues.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

On Thu, 22 Mar 2012 15:28:53 +0000, Jamestechman wrote: >Blame it on cached mode :) check if the user is in cached mode, cached mode has been known to repeatedly send emails among a host of other issues. The way the problem was described makes it sound like a SMTP problem. Cached mode may act that way, but it sholdn't know if there was a problem sending a message to a user if that user's outside the Exchange organization. Of course, no mention was made in the description of whether the recipients were internal, external, etc. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP