Keep getting strange emails, anyone heard of this?

[Fastcat]

I keep receiving emails from people subscribed to a Spacecom-text2 mailing list.

At the bottom of each email there is a section like this:


_______________________________________________
Spacecom-text2 mailing list
Spacecom-text2@list1.space.com


Usually the text is a link and I think the top one bounces an email to whomever is on their list. Anyone heard or seen this one before? Its kind of freaking me out as it seems like I am spamming people...

I am subscribes to www.space.com's mailing list but I dont know if this is related to that at all...