looking at the var dump in fo, it says the from address is:
["waue_contact-led-warehouse-confirm_1_From"]=>
string(24) "sales@ledwarehouseuk.com"
and in the status it is says it is sending to the same address:
["waue_contact-led-warehouse-confirm_1_Log"]=>
string(53) "Sending To: sales@ledwarehouseuk.com... Success
most SMTP servers will refuse to really a message that uses the same address for the from address and the to address.
The From and To addresses should be unique.