Yes, it would be for Windows.It depends on your definition of 'half-decent', but I haven't had any problems with VPOP3 and it's quite cheap.
I'm assuming that this is in the 'Software for Windows' forum because you're interested in mail server software for Windows.
Yes, it would be for Windows.
For Linux, I think there is only simple send/recieve. Nothing that even comes close to Exchange (making it not decent at all)
Well would a "free Exchange" be better?Your only guidance so far has been "like Exchange" and "runs on Windows". Exchange includes proprietary protocols for example, do you need compatibility with those, or is it the group calendaring you like, or its tight integration with Outlook? Are your requirements even inherently e-mail related, or would some sort of groupware software be a better fit for your needs?
Personally, if I were to draw a Venn diagram with the circles labelled 'decent' and 'MS Exchange', the two would not intersect at all, but that's just my opinion. Specifics are helpful (and without specifics my opinion isn't very helpful either, but since AFAIK they're not relevant to the question(s) you want to ask, I'm not including them here).
My first thought regarding your requirements is that you're asking for something that won't exist, because if any Windows mail server tried to be too much like Exchange, I'm pretty sure MS would look for a reason to stamp it out.
Personally, if I were to draw a Venn diagram with the circles labelled 'decent' and 'MS Exchange', the two would not intersect at all, but that's just my opinion.
I know it's your opinion and all, but really? Come on now. Exchange is extremely solid and while I do not have any experience with other email solutions, I can't imagine anything else being so far above and beyond that Exchange is labeled anything below "decent".
Well would a "free Exchange" be better?
Or are there more detailed features needed?
I think I would need ActiveSync/IMAP/etc support and contacts. All of this synced to be different devcies (Android, OS X, Windows, etc) and compatible with Outlook.
Never used it myself so not sure what kind of features it has but you could look at http://www.zimbra.com/
