Phil it's probably legit but as our name suggests we are an engineering forum, not a software one, and this really does not have to do with engineering, so we are probably not the best people to advise you? So maybe you should use a software forum instead (CNET, or ZDnet who as far as I know still publish PC Magazine, would be a start, though I have not been there for years).I just googled Mailvita and it looks legit, in fact some of the first hits were the CNET site for downloading it, and they are reputable as far as I know. Maybe try and find some reviews and then if you want to download, do it from a reputable site like CNET, or the developer's site. Basically that's what I do if I want new software....I did google for reviews and it seems this is quite a new software so there is not much, I did not have time to dig very deep. But always do your due diligence on stuff like this.
