postfix complains of mystery host

bluethundr · 04-15-2010, 02:03 PM

At one point I changed my hostname from mail.jiffycloud.com to cloud1.jiffycloud.com

My postfix however complains about receiving mail for a non-existent machine

Code:

Apr 15 14:56:32 domU-12-31-39-02-BD-C1 sendmail[1567]: o3FItvV8001565: o3FIuWV8001567: DSN: Host unknown (Name server: mail.jiffycloud.com.: non-recoverable error)
Apr 15 14:56:32 domU-12-31-39-02-BD-C1 sendmail[1567]: o3FIuWV8001567: to=<bluethundr {at} gmail {dot} com>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=31435, relay=gmail-smtp-in.l.google.com. [74.125.113.27], dsn=2.0.0, stat=Sent (OK 1271357792 30si3983691vws.43)

Yet I have grepped my /etc directory for that host and turn up nothing for that hostname except in my backup files:

Code:

[root@cloud1 ~]# grep -ri mail.jiffycloud.com /etc
/etc/postfix/bak/main.cf-.bak:masquerade_domains = mail.jiffycloud.com jiffycloud.com !sub.dyndomain.com
/etc/postfix/bak/main.cf-04-14-10.bak:masquerade_domains = mail.jiffycloud.com jiffycloud.com !sub.dyndomain.com
/etc/postfix/bak/main.04-15-10.cf.bak:masquerade_domains = mail.jiffycloud.com jiffycloud.com !sub.dyndomain.com
/etc/postfix/bak/main.04-07-10.cf.bak:masquerade_domains = mail.jiffycloud.com jiffycloud.com !sub.dyndomain.com
grep: /etc/httpd/run/dbus/system_bus_socket: No such device or address
grep: /etc/httpd/run/audispd_events: No such device or address
grep: /etc/httpd/run/avahi-daemon/socket: No such device or address
grep: /etc/httpd/run/cups/cups.sock: No such device or address

what gives?

I have changed /etc/mailname to my new hostname and have

ShadowCat8 · 04-15-2010, 04:05 PM

Greetings,

The first 3 questions that comes to mind for me are as follows:

What is in your /etc/nsswitch.conf file for hosts and networks?
What is in your /etc/resolv.conf?
What is in your /etc/hosts file for the machine itself?

HTH.

bluethundr · 04-16-2010, 09:57 AM

Greetings,

Quote:

"The first 3 questions that comes to mind for me are as follows":

What is in your /etc/nsswitch.conf file for hosts and networks?

Code:

#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '[NOTFOUND=return]' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
#       nisplus or nis+         Use NIS+ (NIS version 3)
#       nis or yp               Use NIS (NIS version 2), also called YP
#       dns                     Use DNS (Domain Name Service)
#       files                   Use the local files
#       db                      Use the local database (.db) files
#       compat                  Use NIS on compat mode
#       hesiod                  Use Hesiod for user lookups
#       [NOTFOUND=return]       Stop searching if not found so far
#

# To use db, put the "db" in front of "files" for entries you want to be
# looked up first in the databases
#
# Example:
#passwd:    db files nisplus nis
#shadow:    db files nisplus nis
#group:     db files nisplus nis
passwd:     files
shadow:     files
group:      files

#hosts:     db files nisplus nis dns
hosts:      files dns

# Example - obey only what nisplus tells us...
#services:   nisplus [NOTFOUND=return] files
#networks:   nisplus [NOTFOUND=return] files
#protocols:  nisplus [NOTFOUND=return] files
#rpc:        nisplus [NOTFOUND=return] files
#ethers:     nisplus [NOTFOUND=return] files
#netmasks:   nisplus [NOTFOUND=return] files     

bootparams: nisplus [NOTFOUND=return] files

ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files
bootparams: nisplus [NOTFOUND=return] files

ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files
netgroup:   files

publickey:  nisplus

automount:  files
aliases:    files nisplus

                                                              63,0-1        Bot

What is in your /etc/resolv.conf?

Code:

; generated by /sbin/dhclient-script
search compute-1.internal
nameserver 172.16.0.23

What is in your /etc/hosts file for the machine itself?
Code:
```
127.0.0.1   cloud1  cloud1.jiffycloud.com
```