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- Xref: sparky comp.mail.sendmail:3124 comp.unix.ultrix:9211
- Newsgroups: comp.mail.sendmail,comp.unix.ultrix,comp.sys.ultrix
- Path: sparky!uunet!math.fu-berlin.de!news.belwue.de!news.uni-ulm.de!xwini!gaissmai
- From: gaissmai@xwini.rz.uni-ulm.de (Karl Gaissmaier)
- Subject: SUMMARY: i refuse to talk to myself
- Message-ID: <1993Jan8.090604.4425@wega.rz.uni-ulm.de>
- Keywords: MX, DNS
- Sender: gaissmai@xwini (Karl Gaissmaier)
- Organization: Universitaet Ulm
- Date: Fri, 8 Jan 1993 09:06:04 GMT
- Lines: 66
-
- In article <1992Dec14.084352.29295@wega.rz.uni-ulm.de> gaissmai@xwini.rz.uni-ulm.de
- (Karl Gaissmaier) writes:
-
- >MikroVax-3100
- >ULTRIX V4.2 (Rev. 85)
- >Sendmail-5.57
- >
- >This machine (netway.rz.uni-ulm.de) is our domain name server and MX-Server
- >for various other machines. netway is also our backup MailExchanger for
- >mathematik.uni-ulm.de, see below:
-
- > mathematik.uni-ulm.de preference = 0, mail exchanger = laborix.mathematik.uni-ulm.de
- > mathematik.uni-ulm.de preference = 5, mail exchanger = titania.mathematik.uni-ulm.de
- > mathematik.uni-ulm.de preference = 100, mail exchanger = netway.rz.uni-ulm.de
- > mathematik.uni-ulm.de preference = 200, mail exchanger = noc.belwue.de
-
- >in the case, that both MX-Servers laborix.mathematik.uni-ulm.de and
- >titania.mathematik.uni-ulm.de are down at the same time, all mails
- >for mathematik.uni-ulm.de are sent to netway.rz.uni-ulm.de.
- >
- >The netway now doesn't queue the mails until the more precedenced
- >MX_Servers laborix or titania are online, netway tries to connect
- >with itself and in order to prevent loops, netway can only say:
- > i refuse to talk to myself
- =========================================================================================
-
- the solution is:
-
- this sendmail version does not set the fully qualified domain name (FQDN) in the $w Makro, but
- the comparison with the MX-RR is made with the $w Makro and therefore netway can not
- recognize itself because netway and netway.rz.uni-ulm.de are different.
-
- make the following:
-
- set the $w Makro to the FQDN explizit: Dwnetway.rz.uni-ulm.de
- set the $A Makro to the unqualified domain name: DAnetway
- replace all occurences of $w with $A in the .cf file
-
- =========================================================================================
-
- many thanks to all replies on the net. i was ill after my question and my news-grabber
- didn't save the headers, and therefore i can't say my thanks to the man who helped me
- with the right hint, but it was the following article number and text [no trailers :-(]:
-
- >Article: 3925 of comp.mail.sendmail
-
- >You need to make sure that $w is defined to be 'netway.rz.uni-ulm.de'
-
- >If sendmail does not automatically define it this way try adding a
- >line
-
- > Dwnetway.rz.uni-ulm.de
-
- >to your configuration. You may then have to make some other changes
- >to avoid double domains.
-
- >[Explanation: sendmail check an MX record against $w. If they are equal
- >it discards this MX record and any record of worse preference. Thus if
- >the two main hosts are down it should now queue the mail rather than
- >send to itself].
-
- many thanks explicit to this author :-(thanks)
-
- btw is there an archiver of the group comp.mail.sendmail??
-
- gaissmai@rz.uni-ulm.de
-