Review IMAP for Mail (Mac OSX)

IMPORTANT:

Wherever you see your.name@domain.name in the examples below, replace with your own email address, all in lower-case.

1: Open Preferences
2: Receiving Messages
3: Sending Messages
Follow ONE of two options for the next screen.

If you enter the details exactly as below, ensure that you select/tick the "Store sent messages on the server" option on the next screen.

The recommended (and quicker, less bandwidth consuming) option is to actually replace the below with your.name+sent@domain.name and to NOT select/tick the "Store sent messages on the server" option on the next screen.

WARNING: Disabling the storing of messages to the Sent folder below, is only advisable if you use your.name+sent@domain.name on the page above, which instructs the sending server to do so.