They had set up their hotmail account and could receive but could not send. They had also just recently moved to BT and had the new home hub installed. Email continued to send perfectly whilst using a Vodafone 3g dongle.
To resolve the issue, please perform the following:
- GO TO > Apple Icon top left > System Preferences > Network > Wireless
- Select your wireless connection > Click Advanced lower right on popup
- Select DNS tab
- Click on the + under DNS left pane and type the following :- 184.108.40.206
- Click Apply
Please note, these instructions work if you are connected wirelessly.
If you are connected via a cable, please select the Ethernet option after going into System Preferences > Network > Ethernet