I am running windows 2003 with exchange 2003 SP2, trying to allow send/receive 15mb attachment. I allowed at the smtp virtual server, glogal setting of ESM and indivual user limit but still no luck. How are people doing this?here are 3 link that I found about limiting send/receive on server:http://www.msexchange.org/tutorials/Set-Size-Limits-Messages.htmlhttp://support.microsoft.com/kb/322679http://www.petri.co.il/setting_size_limits_for_messages.htm

Can you post the exact NDR users get when the messages bounce back? I assume that is what is happening. Does Exchange accept mail from the Internet directly or is there anotherSMTPgateway in between?

You will have to increase it on Global Settings and then narrow down to connector as well as mailbox level. e.g. set it to 30MB on global and then connector level 20MB and Individual whoever wants to send to 20MbVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Any update regarding the issue? Could you please clarify Andy's questions?