hi everyone,i just want to know one thing, that how we can find out the total mail size, we alloted 5 MB to all our server , but attachment of 4 MB is bounce back , i know Message headers and content increased 20 to 30 % of mail size, but undelieverable mail comes , and the mail size is showing 4.50 MB, is there any workaroung for thisthanksjeevan

No, you have to plan the size limit accordingly by considering 30-40% of increase during content conversation from MIME or Internet to MAPI or visa-versa... So, if you want to restrict the users at 5MB then you can configure the size limit 6.5-7MB... Frequently asked questions about MIME and content conversion in Exchange 2000 Server and in Exchange Server 2003 http://support.microsoft.com/kb/836555 Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Check this articlehttp://technet.microsoft.com/en-us/library/bb124345.aspxFor internal message flow, Exchange2007 uses the custom X-MS-Exchange-Organization-OriginalSize: message header to record the original message size of the message as it enters the Exchange2007 organization. Whenever the message is checked against the specified message size limits, the lower value of the current message size or the original message size header is used

hi amit,thanks , i increased it to 6 to 7 MB for all usersthanksjeevan