Looks like a language variable that is not being expanded. In addition to multi-language, they use language variables for simple replacements in the template engine (equivalent support is NOT in the php function __().
I am trying to do the same thing. I have 5 URLs that link to my cscart ultimate database. That was the purpose for Ultimate after all. However, no matter what the settings under email settings, or company email settings, will the newsletter send from the correct store. It only sends from the primary store, which I will call #1 url. This occurs even if the emails settings in the other stores, #2-5 are set to different users, emails and hosts. Did anyone figure out the answer to this?