I am certain that my Mac is being used by some unauthorised third party to send out e-mails. I ferquently get messages telling me that mail delivery failed. Invariably, these messages concern a mail that I am unaware of and are to an address I have never heard of.
An example of one such returned mail is:
Sent: Sat, 18 Sep 2004 14:23:37 +0000
did not reach the following recipient(s):
If anybody knows how I can stop this, I would be grateful for advice.
I am on Broadband, using Mac 10.3
Thanks in anticipation.