Tuesday 16 September 2014

Exchange 2013 Reconfiguring the Default E-Mail Maximum Size (including Attachments)

If you want to increase the maximum size an e-mail can be that is accepted as inbound mail by Exchange it can be done using the ECP, you must navigate to Mail Flow > Receive Connectors and use the .... button to expose the Organization Transport Settings option.

From the Limits tab, you can increase the Maximum Receive Message Size (MB): I changed mine to 25 MB's, while I was in here I also changed the outbound limit to 25MB.

The following PowerShell command can be used to check the ECP has made the configuration change properly.

Get-TransportConfig | ft MaxSendSize, MaxReceiveSize