Spam?

Question

I've recently received several strange emails that seem to be in response to emails that I don't remember sending and to addresses that I don't recognize. One of those emails was to five aol.com addresses that I don't recognize. I've listed the emails below. They all have attachments, which I haven't opened. These emails were captured by my Earthlink spam filter. I'm not worried about the emails themselves, but I wonder if my computer could be sending spam? Thanks, Caoim
From: Mail Administrator <[email protected]>
To: (me)
Subject: Mail System Error- Returned Mail
Date: Dec 17, 2009 2:01 PM
Attachment: "unknown-351 B Forwarded-Message"
"This Message was undeliverable due to the following reason:
Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why
each recipient was rejected.
Recipient: <[email protected]>
Reason: Unrouteable address"
From: [email protected]
To: (me)
Subject: Delivery Status Notification (Failure)
Date: Dec 17, 2009 10:46 PM
Attachment: "unknown-264 B Forwarded Message"
"This is an automatically generated Delivery Status Notification. Delivery to the following recipients failed.
[email protected]"
From: Mail Delivery Subsystem <[email protected]>
To: (me)
Subject: Warning: could not send message for past 3 hours
Date: Dec7, 2009 10:35 AM
Attachment: "unknown-290 B Forwarded-Message
THIS IS A WARNING MESSAGE ONLY YOU DO NOT NEED TO RESEND YOUR MESSAGE **********************************************
The original message was received at Mon, 07 Dec 2009 22:35:17 +0700
----- The following addresses had transient non-fatal errors -----
<[email protected]>
----- Transcript of session follows -----
Warning: message still undelivered after 3 hours
Will keep trying until message is 1 days old
From: Mail Delivery Service <[email protected]>
To: (me)
Subject: Delivery Status Notification
Date: Dec 8, 2009 6:37 AM
Attachments: unknown-290 B Forwarded-Message
"The original message was received at Tue, 08 Dec 2009 18:37:54 +0700
----- The following addresses had permanent fatal errors -----
<[email protected]>
----- Transcript of session follows -----
554 could not connect and send the mail to mailin-01.mx.aol.com
From: [email protected]
To: (me)
Subject: Delivery Status Notification (Failure)
Date: Dec 17, 2009 10:50PM
Attachment: unknown-698 B Forwarded-Message
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
Confidentiality Notice:
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at [email protected] immediately and destroy all the copies of this message and any attachments
From: Mail Delivery System <[email protected]
To: (me)
Subject: Delivery Status Notification (Failure)
Date: Dec 18, 2009 4:38 AM
Attachment: "unknown-279 B Forwarded-Message"
The following message to <[email protected]> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'Unrouteable address'

Answer 1

there are no clues in that email. but as I said, this is an extremely common practice of spammers. they send mass emails and fake the sent from address as yours. anything that bounces for any reason comes back to you. there is no known OS X malware (there is hardly any OS X malware, period) that would cause Mail to send emails automatically so this is clearly what's happening.