chris@cs.utexas.edu (Chris Andersen (The Dangerous Guy) (07/30/90)
We've recently begun looking into upgrading our systems from SunOS 3.5 to 4.1. As part of this work I set up an evaluation copy of 4.1 on one of our nodes and began working on producing a stable environment for our development. While doing this, I noticed an "interesting" problem in communication between sendmail running on the server (running 3.5) and my node running 4.1. If I go on the server and try to mail to 'user@node', sendmail routes the message to the sendmail daemon on the 4.1 node with the address 'user@node.uucp'. The 4.1 node correctly sends the message to 'user'. However, if I tell the server to send to 'node!user', the server's sendmail translates the address to 'user@node.server.uucp' and sends it to the node's sendmail daemon for further processing (like before). The node's sendmail attempts to parse this address but can't figure it out, so it re-routes it BACK to the server to see if it can figure it out. The server, of course, repeats what it just did and sends it back to the node. The node repeats what it did and sends it back to the server...and so on until the message bounces due to an 'alias loop'. Does anyone have any idea what might be causing this problem? Chris Andersen (..!uunet!sequent!toontown!chris)