It could be easier if I could mail the content of comments to myself, that way I do not have to open the comment, read it.

I initially tried to use triggers/actions to have the contents of new comments emailed to me, but couldn't get it to work for reasons I can't recall. But what I did do - and what works quite well - is use Views to construct a view of recent comments, then subscribe to its feed with my feed reader. Now when I see a new comment come in to my feed reader which is relatively short and contentless ("Great post! That annoys me too!") and/or from someone I don't know, I'll check it out to see if it's spam. On the other hand, if it's from someone I do know and/or seems earnestly written, I know it's safe to just leave it alone.

Of course, this tip prob'ly won't do you much good if you don't regularly use a feed reader.