I've got an email address that I'm receiving "mail delivery failed" messages to - the problem is that I didn't send them. It appears that it is being used to spoof messages with virus attachments. It is a business address, so the image is not particularly favorable. I have not received this before today, and this is the second one (the first was a single email address). I'm assuming either my time has finally come, or someone is making an effort to exploit me.
SMTP Security settings for this server are: Mail Relay Options: relay for local users only Allow remote mail to local groups (checked) Check valid sender (checked) Auto-deny possible hack attempts (checked) Disable SMTP "VRFY" command (checked)
Any thoughts on what I should do? The returned message shows about 25 email addresses that were "invalid" so it is getting sent to a lot of people.
Thanks for your help.
Todd
You should change your Mail Relay Option to either "No Mail Relay" or "Relay mail for addresses". Right now you're an open relay!
Mike
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