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I'm trying to send mail to root@localhost but no matter what I try it doesn't work. I always get DNS lookup errors:

Dec 20 10:08:56 HD-T2597CL sendmail[4408]: nBKF8uEu004408: from=root@Server1, size=451, class=0, nrcpts=1, msgid=<1261321735.4404@Server1>, relay=root@localhost
Dec 20 10:08:56 HD-T2597CL postfix/smtpd[4409]: connect from Server1[127.0.0.1]
Dec 20 10:08:56 HD-T2597CL postfix/smtpd[4409]: 075FE18080C4: client=Server1[127.0.0.1]
Dec 20 10:08:56 HD-T2597CL postfix/cleanup[4412]: 075FE18080C4: message-id=<1261321735.4404@Server1>
Dec 20 10:08:56 HD-T2597CL postfix/qmgr[3791]: 075FE18080C4: from=<[email protected]>, size=495, nrcpt=1 (queue active)
Dec 20 10:08:56 HD-T2597CL sendmail[4408]: nBKF8uEu004408: to=root@localhost, ctladdr=root@Server1 (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30451, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Ok: queued as 075FE18080C4)
Dec 20 10:08:56 HD-T2597CL postfix/smtpd[4409]: disconnect from Server1[127.0.0.1]
Dec 20 10:08:56 HD-T2597CL postfix/smtp[4413]: 075FE18080C4: to=<[email protected]>, relay=none, delay=0.05, delays=0.05/0/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=localhost.localdomain type=MX: Host not found, try again)
Dec 20 13:57:55 HD-T2597CL sendmail[8885]: nBKIvtng008885: from=root@Server1, size=453, class=0, nrcpts=1, msgid=<[email protected]>, relay=root@localhost
Dec 20 13:57:55 HD-T2597CL postfix/smtpd[8686]: connect from Server1[127.0.0.1]
Dec 20 13:57:55 HD-T2597CL postfix/smtpd[8686]: 97A4618080B9: client=Server1[127.0.0.1]
Dec 20 13:57:55 HD-T2597CL postfix/cleanup[8689]: 97A4618080B9: message-id=<[email protected]>
Dec 20 13:57:55 HD-T2597CL postfix/qmgr[8596]: 97A4618080B9: from=<[email protected]>, size=611, nrcpt=1 (queue active)
Dec 20 13:57:55 HD-T2597CL sendmail[8885]: nBKIvtng008885: to=chris@localhost, ctladdr=root@Server1(0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30453, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Ok: queued as 97A4618080B9)
Dec 20 13:57:55 HD-T2597CL postfix/smtp[8690]: 97A4618080B9: to=<[email protected]>, relay=none, delay=0.04, delays=0.04/0/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=localhost.localdomain type=MX: Host not found, try again)
Dec 20 13:57:55 HD-T2597CL postfix/smtpd[8686]: disconnect from Server1[127.0.0.1]

My config is set to:

mydomain = domain.org
myhostname = mail.domain.org
myorigin = domain.org

Options using the default settings: inet_interfaces mydestination

my /etc/hosts file:

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1   Server1 localhost.localdomain localhost
::1     localhost6.localdomain6 localhost6
209.x.x.x   Server1

I have no idea what to do now...

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3 Answers 3

Reset to default
1

check that localhost is listed under mydestination

this is the default, but you probably have something else

mydestination = $myhostname, localhost.$mydomain, localhost

also check that you dont have relayhost set and that /etc/postfix/transport is empty

check also that root is not aliased to anything in /etc/aliases

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2
  • I've tried your suggestion but it's still not working and before that it was set to default settings. I've tried sending mail to root@localhost, root@Server1 and different users.
    – aardbol
    Dec 20, 2009 at 18:59
  • Oh, and my mail server does not use the 209.x.x.x IP address but another one. Does this IP need to be on the hosts file too?
    – aardbol
    Dec 20, 2009 at 19:05
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IMHO Postfix bails out because it is confused about domain.org . Please run

hostname -f

and check if result:

1.is sane (it should be Server1.domain.org . If not, tidy up the /etc/hosts as described below)

2.resolves to valid IP address of the server (can be found in /etc/hosts)

Again,IMHO - the "localdomain" thingy is an abomination that is good for nothing but headache and I get rid of it/replace it with real domain as soon as a server is put into my hands. I usually put into the /etc/hosts something like:

127.0.0.1   localhost.domain.org localhost
209.x.x.x   Server1.domain.org Server1

Every name is there once and there is clear distinction between loopback and external name/address.

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0

After a lot of searching and testing I managed to find the solution:

  1. I switched from the OpenDNS resolvers to the ones that my webhost provides.
  2. Then I added mydestination = $myhostname, localhost.localdomain, localhost to the Postfix configuration as AlekSandar mentioned

That made it work.

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