Lennart_Lovstrand.EuroPARC@Xerox.COM (05/25/90)
In article <106@tdatirv.UUCP> swf@tdatirv.UUCP writes: >In article <1990May21.181455.22689@mozart.amd.com> mikel@mozart.amd.com >(Michael W. Wellman) writes: >> I've several machines which are used interactively >>and we wish to have all mail sent only to one machine. So, assuming that >>foo is the mail machine, if user@bar sends mail to user1, I want: > >>1) the mail to be routed automatically to user1@foo >>2) the return addresses to be configured so that the return address shows >> up as user@foo. >> > I would also be interested in this. We have a very similar situation >here. And it makes for some real difficulties with external mail. Hi, maybe this helps. The configuration file in the IDA Sendmail Kit has had this feature for a long time in two forms: The general version uses a separate "GENERICFROM" database that maps arbitrary physical addresses (even non-local) to logical addresses for all header senders. The database is in turn derived from an extended form of the aliases database (called xaliases). For example, an entry like: lel@ida, lenlo@ida, Lennart.Lovstrand@ida: <> L-LOVSTRAND@LISBET, < lel@obelix, < LENNART@HAZEL, <> lenlo would mean that any mail coming from either of L-LOVSTRAND@LISBET, lel@obelix, LENNART@HAZEL, or lenlo on the local host will be rewritten to have a sender of lel@ida.liu.se. (Conversely, any mail to lel@ida, lenlo@ida, or Lennart.Lovstrand@ida will be delivered to L-LOVSTRAND@LISBET and lenlo on the local host.) While this feature relies on IDA's generic DBM support, you may be able to use Sun's YP macros as a substitute. The simpler version defines a set of hosts which are to be hidden behind the mailer's hostname. Any sender address coming from a user on one of these hosts will be rewritten as user@$j. The recipe for this goes somewhat like this: FH/etc/hosts.equiv (or whatever file you want to use) S5 (or S1 on non-IDA Sendmails) ... # Hide these nodes using our own name R$+@$=H $: $1@$j ... All of the above substitutions are performed in ruleset 5 in IDA Sendmail, which is the header sender specific ruleset. In a normal sendmail, it would have to go into ruleset 1, which serves both envelope and header senders. -------- On the side, I really wish people wouldn't set "Distribution: usa" on issues that aren't specifically limited to the US. I generally hate receiving mail or news related to someone wanting to sell their car in some remote part of the world, but I also dislike being cut off from an interesting information flow for no particular reason. Please let's try and keep distributions to be meaningful. Cheers, -- --Lennart <Lovstrand.EuroPARC@Xerox.COM> Rank Xerox EuroPARC, 61 Regent St, Cambridge, CB2 1AB, England
jik@athena.mit.edu (Jonathan I. Kamens) (05/26/90)
Project Athena has a similar problem. We have almost 1000 public workstations, none of which receive mail locally; however, mail sent from them goes through sendmail, and the addresses of local users have to have "@ATHENA.MIT.EDU" tacked onto the end of them. We accomplish this by doing the following: 1. Outgoing mail from a workstation is run through a *very* bare-bones cf file which is capable of delivering only mail that is explicitly marked LOCAL or POP (e.g. user@host.LOCAL). Since most workstations aren't configured for local accounts or for pop, the LOCAL and POP delivery lines in the cf file are very rarely used. 2. Any mail that is not LOCAL or POP is forwarded to the mailhub for delivery. 3. The mailhub takes "@ATHENA.MIT.EDU" onto any address that has only a username on it, then continues with mail delivery. 4. There is a huge automatically generated aliases file on the mailhub which says where incoming mail is supposed to go. This includes all the mailing lists, and all the post-office addresses for users (mail isn't stored for everybody on the mailhub; it's stored on several post offices from which users pick up their mail using Kerberized POP protocol). Now, an example. Let's say I'm on workstation w1, and I send mail with a To: address of "joeruser". Here's what happens: 1. The local cf sees that the message isn't LOCAL or POP, so it forwards it to ATHENA.MIT.EDU, the mailhub. 2. The mailhub sees the "joeruser" and changes it to "joeruser@ATHENA.MIT.EDU". It also changes the from address from "jik" to "jik@ATHENA.MIT.EDU", since the local cf doesn't add the workstation address to my address. The "@ATHENA.MIT.EDU" stuff is added both in the message text and internally. 3. The mailhub then realizes that the joeruser address is local after it strips off the @ATHENA.MIT.EDU internally (but not in the message text), and finds the post office address for joeruser in the aliases file, and delivers it. You can use a similar mechanism, on a smaller scale, to channel all of your mail through one machine with a big aliases file. Note, however, that this scheme makes it difficult to send mail directly to a machine participating in this scheme, because the machine is going to want to forward the message to the mailhub unless you end the message in LOCAL. If there is some interest, I can post our workstation and mailhub cf files (or, at least, all of the relevant parts -- I don't think I need to post the standard canonicalization stuff). Jonathan Kamens USnail: MIT Project Athena 11 Ashford Terrace jik@Athena.MIT.EDU Allston, MA 02134 Office: 617-253-8495 Home: 617-782-0710
Makey@Logicon.COM (Jeff Makey) (05/30/90)
Add a rule similar to the following to ruleset 3:
R$*<@$%y>$* $:$1<@mailhost>$3 route YP hosts to the mail host
This will rewrite any host name known to YP into "mailhost". By doing
this in ruleset 3, all return addresses and recipient addresses will
be affected. You may need to modify this to account for domain-ized
names. Replace "mailhost" with the name of your mail host, or add
"mailhost" as a host alias.
:: Jeff Makey
Department of Tautological Pleonasms and Superfluous Redundancies Department
Disclaimer: All opinions are strictly those of the author.
Internet: Makey@Logicon.COM UUCP: {nosc,ucsd}!logicon.com!Makey