I have now received over 150 of these error messages. I've sent the core bit of information. I've mailed requests for help to postmaster@... and also I checked whois and found the address of a person associated with the host. I've received no help. Anybody have a clue? Carl Reimann, co-owner [log in to unmask] ----- Transcript of session follows ----- 554 mailer munixin died with signal 11 <[log in to unmask]>... Deferred: Host Name Lookup Failure