There are many forms of ‘Malware’ that can affect a computer system, of which ‘a virus’ is but one type, ‘trojans’ another. Using the strict definition of a computer virus, no viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions. The same is not true of other forms of malware, such as Trojans. Whilst it is a fairly safe bet that your Mac will NOT be infected by a virus, it may have other security-related problem, but more likely a technical problem unrelated to any malware threat.
You may find this User Tip on Viruses, Trojan Detection and Removal, as well as general Internet Security and Privacy, useful:
The User Tip (which you are welcome to print out and retain for future reference) seeks to offer guidance on the main security threats and how to avoid them.
Hi Klaus in reply to you last message.
I have never had anything to do with this company or whatever they are the came out of nowhere and I can not contact them as they have no contact details other than the ++++ they send me.
I did not invite them in. As there are not contact details how can I get rid of them. Would you like me to forward some of the 10's of messages they send me so you get he picture.
Melrose Hill wrote:
Looks to be a standard, automated non-delivery notice from iomart.
I suspect somebody has sent spam e-mails to a number of people at iomart using your e-mail address.
That's definitely not caused by any kind of malware infection on your machine.
One likely possibility - probably the most likely - was already addressed by MadMacs0.
Another possibility is that you have some kind of auto-response rule set up, either in Mail or on the mail server. A bad auto-responder would send an automatic response every time one of those undeliverable mail notifications arrived in your Inbox, thus creating an "infinite mail loop." Check your mail rules, both in Mail's preferences and on your e-mail server.