The limits are total message size after messages are encoded into plain text 7-bit ASCII, which expands them, sometimes considerably, so set a limit quite a bit higher than what you really want, say around 40MB.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi For the Size setting, you could refer to the help link below http://exchangepedia.com/2007/09/exchange-server-2007-setting-message-size-limits.html As the article saidfor Content conversion and message size limits Content conversion generally increases the message size — roughly by 30%. For 20mb, approximately set to 26mb, and for 21mb, approximately to 27.3mb So, If you would like the limit to be 25mb, the minimum is 33mb Cheers Zi Feng

I am trying to get the send/receive size set to 25MB in Exchange 2007 with SP3 runing on SBS 2008 server. I have been reading the previous posts and have been able to receive 3 emails that are between 16 and 18MB, however when I try to receive one that is 21MB it errors out. I have been using the Exchange Management Console to make the changes to the receive connectors setting it to 25600, I also set the Send Connectors and Transport Settings also to 25600. How is it that I am not receiving emails in the 20MB size yet I can get 18MB?

The limits are total message size after messages are encoded into plain text 7-bit ASCII, which expands them, sometimes considerably, so set a limit quite a bit higher than what you really want, say around 40MB.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Not that Ed requires it but I can confirm he is correct and I would have advised the same. Good luck.