Claus, The meaning of 4xx vs. 5xx response codes, according to RFC 1893:
> 4.X.X Persistent Transient Failure > > A persistent transient failure is one in which the message as sent > is valid, but some temporary event prevents the successful sending > of the message. Sending in the future may be successful. > > 5.X.X Permanent Failure > > A permanent failure is one which is not likely to be resolved by > resending the message in the current form. Some change to the > message or the destination must be made for successful delivery. Note that 4xx codes do not require a change to the destination MX, so they are understandably interpreted as a requeue order. There's no "must" in any of the RFCs to support Axent/Symantec's assertion. Sandy Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
