It depends if you are a glutton for punishment, an email guru, providing free or fee service, the phase of the moon (or semester), the reliability (conformability) of the SMTP client trying to deliver the mail (VM/CMS SMTP is not the most RFC conformable). E.g., if *I* recognize a well-connected site having certain kinds of problems, I might search the WHOIS db, use NSLOOKUP on the SOA RR, email postmaster@tld, etc looking for a cognizant network/administrator and in the interim, SET listname NOMAIL NOPOST FOR *@host Then again, I must just DELETE. At 11:12 04/09/1999 Friday -0400, you wrote: | |What is the best method for dealing with the bounce backs? |Going through them manually takes hours. |Here is what the deletion is set to in the list header |* Auto-Delete=Yes,Semi-Auto,Delay(0)