First of all, I apologize for posting this in here. I'm just not sure where else to go to ask this question. When I try to send an email to any of the addresses I get the following error:

This is the Spam & Virus Firewall at

I'm sorry to inform you that the message below could not be delivered.
When delivery was attempted, the following error was returned.

<>: host said: 550
Spam suspect,Your are not Gmail Server (in reply to RCPT TO command)

I have pasted my question below...

I just wanted confirm that this adapter:
Wireless N LAN USB Adapter, 150Mbps, mini (PCUSBW1150)
is compatible with Mac OS X Leopard (10.5.8) before purchasing. Are there working drivers available for this version of OS X?

Thanks in advance, and again, I apologize for posting this here. Just not sure where else to go