This is a common technique used by spammers nowadays.
Spammers use random addresses of innocent domains in the "From" line to send spam.
You may even find that your own domain is being used by spammers. This does not mean that you sent the spam message, just means that it has been used by a spammer to generate spam traffic.
It is possible for anyone to send an email and spoof the address of the sender.
We offer a Spam and Virus Scanning email service, this will help to reduce spam levels to your domain.
