how to join O fusion team ?

I have tried to send a mail to them but get a reply as <andrescarrera@andinanet.net>: host mail.andinanet.net[200.107.10.14] said: 553
5.3.0 Rejected - see http://dnsbl.sorbs.net (in reply to MAIL FROM command)
What's the problem with them ? thanks

You can use the Private Messages (the pm button) of this forum