I have a client that I recently migrated from SBS 2003 to Windows Server Essentials 2012/Office 365 and it is all working quite well.
One minor thing however that annoys them slightly is the slow sending of emails. They only have a slow upload speed on their ADSL 2+ connection (512 Kbps) and as they are solicitors they often handle quite large scanned documents.
This means that some messages tend to stay in the Outbox for up to 1 or 2 minutes which frustrates the CEO of the company (which means I get the agitated phone call)
With their old setup on SBS 2003, the message left the outbox pretty much instantaneously on route to the on premises Exchange 2003 Server.
What I would like to do is setup a secure SMTP relay on the SBS 2012 Essentials Server (already done and tested OK) and route outgoing email through this server instead of the Office 365 SMTP Server
Don't know if this is possible, searches on the web have come up blank so far.
It's a minor problem, but it's causing me major grief
Anyone have any ideas?