I have a few website using 1.4.9 and by this year 2012 i have started to use 1.5.x version for my new sites.
But in my 3 new opencart 1.5.x opencart websites, the outgoing mails is not working for notification invoices, newsletters and account creations.

When a new account created, notification mail comes to admin but not to goes to customer. Orders and newsletters didn't work ever.
I have use both PHP Mail settings and SMTP Mail settings which i got informations from my host company, but it doesn't work ever again. (The 2 website of them have different host companies and they have the same problem also)

I have never set these settings before on 1.4.x versions and all above problems has NOT occured ever and works perfect.

Can anyone explain is that a permanent problem for 1.5.x version? Or is it only for me?
And is there anyone can help me to solve this problems?
Thanks for all answers from now on.
