I don't know if its just me, but whenever someone replys to a topic I have replied in, I get emails telling me. This email however, is always seen as spam and being put into my spam section, even though I've indicated several times that it ain't. I'm using gmail (Google Mail).

Is there any reason for this (serverside perhaps?) or anyway around it?

tell google that its not spam =)

I've done this many times, but it still keeps coming up under the Spam section.

weird...

There's no reason this domain should be marked as spam, so it's probably Gmail's filter, seeing that the e-mail comes regularly, and is pretty much the same all the time, with links etc.

Afaik no way to avoid this, besides doing what you keep doing, and telling gmail it isn't spam.
There isn't a proper prefered-senders/allowed senders list is there? I havn't seen one anyways.