When I read one of your posts, I might consider commenting on that. I can do so on your blog, but I could also write in my own blog. In that case I have the option to trackback you and if your blog enables it, it displays a link to my blog. This way my article (a comment on your blog) is visible to both my viewers and yours. This will often be interesting if we both blog about the same topics, say gadgets or cooking.

This is [url=http://en.wikipedia.org/wiki/Trackback]the Wiki entry about Trackback[/url]

Unfortunately it is often misused by spammers.

Happy blogging

Yes, but trackbacks are open to abuse by spammers. I prefer pingbacks. They're more reliable.

Read here:
http://en.wikipedia.org/wiki/Pingback

Not if you use the DNS anti-spam plugin: http://forums.b2evolution.net/viewtopic.php?t=12041 :-)

I never heard about dns antispam?
what is dns spam?
what is it.

That's a plugin I rote to stop trackback spam. Read the post I linked to, it's all explained there.

How are spammers doing trackbacks if they don't have a BLOG? I mean, if I get a trackback notice, I see a link to the spamming site, but I don't see anything posted there that would reflect the trackback.

So how to spammers do this?

thanks

Umm... they fake it. Like: a program that does nothing but pretend to be a blog sending trackbacks. Or comments. Or (back in the day) referer traffic. They fake it.