I've been trying all different settings with the smtp method such as:
Sending from other email addresses from our domain.
With and without ports ( 25 and 465 )
With and without host.
With and without encryption ( TLS and SSL)
With and Without username and password
I have tried all different selections of above but just cant get it to send.
Subsequently the other three mail methods work fine. I have to be honest and confess ignorance to what the difference between all these are. But from what I have read it appears SMTP is the preferred method which I presume might be because it is more secure.
Thanks in advance.