How would I suppress these bounce errors from going out to the owners without using an email filter on the mail client? I do not wish to make them Quiet owners because they still want to see the Daily Error Report. They just don't want these bounced error notifications. I can not find any error mail template and I'm not sure what to configure for the Errors-To option in the list header.

Thanks in advance for your time.
  ----- Original Message ----- 
  From: Mike 
  To: [log in to unmask] 
  Sent: Wednesday, August 29, 2007 2:10 PM
  Subject: Re: Frequent Bounce Backs


  That is what I thought was also happing at first. 

  We actually have sign-on/sign-off web pages and I thought people were mistyping their email address but when i checked the last 20 messages from last week not one of the bounced addresses have a similar email on the list. I checked against the changelog table just to be sure they didn't exist sometime earlier as well.

  The only thing I mentioned to the list owner was to modify the sign-up/ sign-off page to use one of those graphics that a physical person needs to type the phrase into a textbox. but that would only solve if there was some sort of bot or program that is entering dummy info and submitting the form. I guess there is not much we can do if someone is spamming the "listname-signoff or listname-unsubscribe address" as Nathan pointed out. 
    ----- Original Message ----- 
    From: Valdis Kletnieks 
    To: [log in to unmask] 
    Sent: Wednesday, August 29, 2007 1:53 PM
    Subject: Re: Frequent Bounce Backs


    On Wed, 29 Aug 2007 09:54:25 EDT, Mike said:
    > As I said the owner receives 3-4 per day. Is this a spammer who is
    > trying to send sign-off requests for random email addresses?

    I often easily see 3-4 a day of the following:

    1) User subscribes as [log in to unmask]
    2) User gets new account [log in to unmask], forwards cheapmail.com mail there.
    3) user gets [log in to unmask], resets his forwarding on cheapmail,
    and closes down newmail.com

    4) User goes to unsub, remembers they subbed under an old address, and sends
    the now-dead newmail.com address rather than the even older but still working
    cheapmail.com address.

    *usually*, looking at the From: for the unsub and likely near-matches on the
    list will show what's going on.  If that doesn't flush it out, the list owner
    can always post a monthly reminder "Unsub from the address that was actually
    subscribed" and see if that helps...

    Or are the From: addresses totally and obviously bogus or otherwise not
    possibly just user errors?