Thanks a lot Roman. I tried using both "Contact.IsFromCountry" and "OnlineMarketingContext.CurrentContact.IsFromCountry" methods. They work on the page that acts as the dynamic template for the email newsletter, but, as you said, it seems that Kentico generates the email once as public user, and sends the same content to all subscribers.
Having said that, you can insert mini macro statements like {%FirstName|(resolver)subscriber%}
and this actually works. Even though a newsletter is based on a dynamic template, these macros are replaced properly for each subscriber.
But we want from Kentico is to generate each individual newsletter email with the context of each subscriber, so, US people US-specific content, and, UK people UK-specific content.
Do you think this can be achieved with custom macros?
Thanks
Oz