Hi Kevin
My Hosting provider is also my email provider. I am using the same "from" email address that is authenticated in the host settings of DNN. I am able to test successfuly from the host settings SMTP settings, I am able to send mail from other modules on my site.
Have contacted my hosting provider and their technical team has assured me that all settings are correct. They uninstalled the Smith cart module making sure all files were deleted from the root folder as well as the datadase, they then reinstalled the module which installed, as before, perfectly with no errors. I setup the store again as per the manual, loaded the email templates again and tried again but still the cart does not send order or admin emails.
On submitting an order the following message is written to the site log
StackTrace : at Smith.DNN.Modules.BuyNow.SCMail.SendMail(Int32 buyNowTabModuleID, CustomerInfo customer, StoreOrdersInfo order, BillingAccountInfo account, EmailLabelInfo ei, BuyNowSettingsInfo bi, UserInfo ui, String emailType) at Smith.DNN.Modules.BuyNow.ManageOrderDetail.SendMail(String emailType)
Error : Could not load type 'DotNetNuke.ComponentModel.ComponentBase`2' from assembly 'DotNetNuke, Version=5.4.2.66, Culture=neutral, PublicKeyToken=null'.
I really don't know what else to do..