trying to send a 3mb file but how do i stop the server timing out?

the email gets about 90% there and then the server times out. We have poor upload speeds here. Normally on old email account it just keeps going and after 4 or 5 minutes the email sends. 

Hi Art. Unfortunately you can’t change the timeout settings in eM Client. Better you send it from the web interface for your email account.

You can set eM Client to notify you if the attachments are over a certain size so that does not happen again.