When I set up my Outlook 2016 account I used mail.isp.com.au as incoming and outgoing mail servers. This was on instruction from the isp. Whenever I send an email I am required to put my password into smtp.isp.com.au. Despite to emails to firstname.lastname@example.org I have not received an answer to the question "should I change the account settings for incoming and outgoing mail server to smtp.isp.com.au?" So what should I do?