MAILER-DAEMON Email

For a week or two I've been getting curious emails from 'MAILER-DAEMON@eircom.net' addressed to myself. They are all the same, and list a succession of addresses which the ISP says it could not deliver to. I know none of the addresses. Almost every day I receive another list of addresses which 'MAILER-DAEMON@eircom.net' says it could not deliver for me. Does anyone have any idea as to what's happening here? Thank you.

Example:

Hi. This is the qmail-send program at eircom.net.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<mfratpietro@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<jasondutka19@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<terri_hamilton@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<carmen_blanchard@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<droolab@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<jasonp@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<chestersp@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<feniakpats@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<jwasyliw@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<moon101@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<lddca@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<shooz_2@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<jorylee13@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<grossdaddy@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<knobby23@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<mandyhorbach@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<rpat22@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<rosco_27_ca@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<mrdyrberg@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<kamotzki@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<jendouglas179@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<kellybridges99@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<gomie27@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<markb89@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<rico8570@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<NIKIBRIDGES77@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<andreakattler@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<beuks7@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<angelmacquarrie@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<ckchoney@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<svensoun@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<bigj@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<kralkanadine@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<iangamache6@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<deankush@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<tbecker.sunspun@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<kors19@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<bighozer@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<dieseldan7@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<corryday@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<cryssmith01@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<Candice_Fahlman@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<c_robbins@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<brett@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<mcdick71@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<chewchewjazzie@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<giroux1d@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<johnson306@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<dinhor@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

<cyberdread3g@eircom.net>:
Sorry, no mailbox here by that name. vpopmail (#5.1.1)

 

You could be infected with a virus that runs it's own email app and is sending infected posts without your knowing anything about it.

 

It is possible that your ISP's mail server has been exploited by a spammer. A similar thing happened to me and not only did I get the messages about unable to deliver, but also received spam which looked like I'd sent it to myself.

 

Thanks, Newt. I've updated my antivirus definitions and done a scan, but no viruses found. I've also done a scan for trojans, worms and malware, but clean there too.

You may be nearer the problem, rcerrato, so I'll report the matter to my ISP. We'll see what they have to say, and report back.

Thanks again, folks.