Try:
     g_msg_max "40mb"
Also always consider using a file sharing system like drop box to send a 
large file.

     ChrisP.


On 13/02/2016 11:48 p.m., surgemailHIDDEN@etwinsite.com wrote:
> Hi,
>
> What setting defines the maximus outgoing message size, or attachment
> size? I need to temporarily override this to send a large attachment
> (23MB).
>