>the SMTP process on Krypton rejected it >with: > 553 header line too long >My guess is that Krypton can't handle the long RFC822 header lines >that are now available. LMail translated this error report into an >Error Code 3 (permanent delivery failure). LISTSERV interprets Error >Code 3 to mean unsubscribe this userid. Here is the official meaning of 553 from RFC821: 553 Requested action not taken: mailbox name not allowed [E.g., mailbox syntax incorrect] This code is to be used only after RCPT TO: or VRFY, when an invalid mailbox is specified. The correct code for an error of the type "header too long" after the DATA instruction is 554, so this is probably a typo. LMail translates 554 to a soft error and 553 to a hard one. This being said, deleting the user was the correct thing to do. If his mail system can't handle 'Received:' fields of two lines, you aren't going to get much mail to his mailbox anyway. Eric