Er, no
But in researching, I cant help but question whether I should have added the line that Rocky told you to add below - you said you already had it, but I did not - it wasnt in the guide and whilst I cheerfully added it in, I dont actually seem to have an smtpd service running....
Code:
smtp n - - - - smtpd
Im so confused now I think I need to leave it alone and come back later before I do something daft!