Huge numbers of Undeliverable replies for emails I have not sent

[Guest]

My email address has the format (e-mail address removed). This is the only
valid address for my email, I am the only user. However, my ISP does allow
multiple other names all @myhostname.myISP.net.

Every day I receive dozens of messages from various companies' email systems
addressed to (e-mail address removed) telling me that messages sent
from "anothername" are undeliverable. I have not sent any of these messages.

No infection is found on my PC by numerous A-V and anti-spyware programmes.
Everything is up-to-date, patched, etc. Even when my PC has been offline for
a few days, these messages still arrive.

Has my email address been "stolen" and used by a spammer? How can I stop
these messages?

 

[Brian Tillman]

My email address has the format (e-mail address removed). This is
the only valid address for my email, I am the only user. However, my
ISP does allow multiple other names all @myhostname.myISP.net.

Every day I receive dozens of messages from various companies' email
systems addressed to (e-mail address removed) telling me that
messages sent from "anothername" are undeliverable. I have not sent
any of these messages.

No infection is found on my PC by numerous A-V and anti-spyware
programmes. Everything is up-to-date, patched, etc. Even when my PC
has been offline for a few days, these messages still arrive.

Has my email address been "stolen" and used by a spammer? How can I
stop these messages?

Sounds like your address has been hijacked by a SPAMmer and there's nothing
you can do about it except to filter out the non-delivery reports.

 

[Guest]

Yes, so it seems. So, I suppose this could go on indefinitely! Spammers -
don't you love them.

Thanks anyway, at least it means my PC is "clean".

Alan