Email spoofing is when the email header's "From:" line is modified to something other then the original sender.
One of the features of a standard SMTP server is the ability to modify the email header to be "From:" any address. This is a convenience built in so the address is easy to read (like "bob@HostMonster.com"). This feature is often exploited by spammers trying to mask where they are sending from.
When these emails are set to be "From:" an email address on your domain and bounce, they are sent to our servers trying to deliver themselves to that mailbox. Generally, you will never see these emails. However, if the spoofer happens to configure his "From:" header to be a real email box, the bounce will come back to your mailbox and you will receive the email.
The way these spoofers are tracked down is from the server that is used to authenticate from originally. That server gets reported to ISPs and Email Realtime Black Lists (RBLs) and the spoofing emails stop.
Recommended Help Content
How do I display the Internet email header? (updated 488 days ago)
Understanding Internet email headers. (updated 488 days ago)
Why do scripted e-mails come from < username@host###.HostMonster.com > when I have specified otherwise? (updated 19 days ago)
Related Help Content
The most common cause is that you are either sending to or sending from an invalid email address. You will want to create a new email address, and change your profile to use a different Email address. (updated 2132 days ago)
I am having problems with being spammed. I believe that my email address has been harvested (taken off my site and sold to spammers). Can I hide my email address, but still have people email me? (updated 1110 days ago)
Email is not being received when forwarded to free email services such as Gmail, Yahoo, or Hotmail and other ISP's that provide email service such as AOL, Comcast, Cox, etc. It can show completed in t (updated 504 days ago)
If emails were sent to my address before the email was created, is there a way to get those emails? (updated 908 days ago)
How does a person change the Password, create an Autoresponder and setup Email Filtering on their individual email account without logging into the main account control panel? (updated 439 days ago)
Information on creating email account and domain based email forwarders. (updated 910 days ago)
To setup an email address for your domain name is easily accomplished within the control panel (cPanel). Mail section where Email icon is located Navigate to the Mail section inside cPanel. Click the (updated 75 days ago)
Trying to send out emails from multiple email accounts fail from both webmail and third party email clients. Possible Reasons: The maximum emails per hour has been exceeded. This can be caused by forw (updated 96 days ago)