topic Re: mailer problems in Operating System - HP-UX

mailer problems

Maurice Peterse — Wed, 19 Jul 2000 05:22:13 GMT

I have several systems.
2 of them can't mail to system x
other systems CAN mail to system x

what can i check?

Re: mailer problems

RikTytgat — Wed, 19 Jul 2000 06:18:18 GMT

Hi,

I would check whether hostnames are resolved properly.

Does 'nslookup ' work?

If not, you have a lot of options:
- Do you have a DNS server at your site? Then use it by adding the line
nameserver ip_of_nameserver
to /etc/resolv.conf
- Add the hosts you want to mail to to your /etc/hosts file in following format
ip_address FQDN alias alias ...
where FQDN is the Fully Qualified Domain Name (mymailhost.mydomain.com). Check the contents of /etc/nsswitch.conf. This shoul contain a line looking like:
hosts:files [NOTFOUND=continue] dns
to tell the resolver to first try to resolve using /etc/hosts, and then using the DNS server.

I hope this can solve your problem.
Rik.

Re: mailer problems

Maurice Peterse — Wed, 19 Jul 2000 06:50:58 GMT

I do have NDS
/etc/mail/service.switch didn't exist, now it does
/etc/resolv is ok

any more options?

Re: mailer problems

RikTytgat — Wed, 19 Jul 2000 07:01:25 GMT

Hi,

What is the ouptut of the command

nslookup

where is the hostname of the server you wish to mail to?

Does this return the correct IP address?

Bye,
Rik

Re: mailer problems

Maurice Peterse — Wed, 19 Jul 2000 07:03:13 GMT

yes, exactly the right ip address

Re: mailer problems

Julian Sinclair_1 — Wed, 19 Jul 2000 07:05:11 GMT

you might also want your sendmail setup on the machines which are not sending mail.
send a mail from a machine which is not working and check the syslog for the sendmail entries. Compare this with the entries entered for a mail that is sent correctly. This should at least give you an idea where the is mail is being rejected.

What MUA are you using and what version of sendmail ?

Re: mailer problems

Maurice Peterse — Wed, 19 Jul 2000 07:14:23 GMT

Jul 19 10:04:51 zzzz sendmail[9332]: KAA09332: Ruleset check_mail () rejection: 418 ... invalid host name

Jul 19 10:09:33 zzzz sendmail[9450]: KAA09450: from=, size=0, cla
ss=0, pri=0, nrcpts=0, proto=ESMTP, relay=[199.81.70.13] (may be forged)

this is in /var/adm/syslog/mail.log on the receiving system....

Re: mailer problems

Anthony deRito — Wed, 19 Jul 2000 10:35:51 GMT

Run sendmail in address testing mode on each machine and it will print what it can find as the address of the local machine including its domain name.

sendmail -d0.1 -bt < /dev/null

Verify the names are correct and that you can use nslookup for each name from each machine.