Re: Investigating iPhone Compatibility

[Asai]

So, it's the iPhone which is self-assertively trying to connect to port 25 
regardless of what it's explicitly set to?
Works fine for me. I very much doubt your iPhone in question is actually set to 
use 587 only. IIRC, that is not the default.
-- Larry Stone
    Sent from my iPhone
OK, so perhaps just refusing AUTH on port 25 will solve the problem.  
I've set the Server Port in Outgoing mail settings on iPhone to 587, so 
I don't really understand what's going on here...