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- From: jhidalgo@ecnet.ec (Javier Hidalgo E.)
- Newsgroups: comp.unix.aix
- Subject: Sendmail for CNAME aliases?
- Message-ID: <9212111949.AA12276@ecnet.ec>
- Date: 11 Dec 92 19:49:28 GMT
- Article-I.D.: ecnet.9212111949.AA12276
- Sender: jhidalgo@ecnet.ec
- Reply-To: jhidalgo@ecnet.ec (Javier Hidalgo E.)
- Lines: 42
-
-
- I4m still working on solving my CNAME problem, which I asked about in a
- previous message to this newsgroup. We4ve been able to isolate the
- problem down to a few sendmail configuration questions.
-
- We4ve defined a nameservice CNAME for c.ecnet.ec to ecnet.ec .
- That seems to be working correctly; nslookup tests show the proper:
-
- c.ecnet.ec canonical name = ECNET.ec
-
- However, when we try to send mail from ecnet.ec to "c.ecnet.ec", mail fails
- with the following message:
-
- Subject: Cc: jhidalgo... setsender: uid/gid = 211/206
- jhidalgo@c.ecnet.ec... Connecting to ecnet.ec.tcp...
- jhidalgo@c.ecnet.ec... Connecting to ecnet.ec (tcp)...
- 220 ecnet.ec Sendmail AIX 3.2/UCB 5.64/4.03 ready at Fri, 11 Dec 1992 14:17:44 -0500
- >>> HELO ecnet.ec
- 553 There is a local configuration error. The hostname is not recognized as local.
- >>> QUIT
- 221 ecnet.ec: closing the connection.
- jhidalgo@c.ecnet.ec... Service unavailable
-
- The problem appears to be the fact that sendmail doesn4t do the CNAME
- lookup before decided whether or not to send via ".local", and therefore
- tries to send mail to back to the local machine using SMTP rather than
- ".local" as it should.
-
- Two questions: 1) is there a way to get sendmail to recognize that a
- CNAME points to its own host machine? 2) What does "local" mean in the
- above error message? It seems to us that the problem is, in fact,
- that ecnet.ec IS recognizing "ecnet.ec" as its own name....
-
- Another point of interest: mail for most other machines to this c.ecnet.ec
- address does arrive successfully. However, from a few machines, the
- message fails. It does arrive in the sendmail queue, but for some reason
- sendmail here tries to send the message to itself another time, with the
- same results as above. It would seem that to remote machine does a
- CNAME lookup when establishing the SMTP connection, but doesn4t
- change the destination address in RCTP TO command....
-
- Any ideas as to what4s going on?
-