Sendmail - issue within DMZ for some servers but not all
Hi All,
I have a strange issue and I am not sure where the problem lies.
I have about six Ubuntu servers on our DMZ two of which were built on 18.04 from scratch the others were upgraded to 18.04 from 16.04.
The servers built from scratch can send emails from the server via sendmail fine, so the Firewall rules for coming from DMZ to our internal network is fine.
The servers upgraded to 18.04 cannot send out emails, it is as if sendmail does not work.
This is what I get
I have uninstalled & purged sendmail from a server that does not work and re-installed.
I have updated the sendmail.cf to point to the mail server
the Hosts file has the relevant info...
It still does not work...
could someone help or point me in the right direction?
I am having the same issue on all systems in the DMZ that have updated from 16.04 - 18.04
Hi gurus!
I need help to make sendmail to accept unknown user mail. That is if the user does not exist sendmail keep on processing the mail and store it in a some mailbox ...
Thanks for any idea! (5 Replies)
Hi,
yesterday I had issues, sendmail was not responding quickly while sending email and users did not receive any email,
This happened with sendmail on solaris 10 and also with sendmail on a linux box.
Found it is something to do with DNS blacklists,
following lists did not work for me,... (2 Replies)
Hi Team,
I have a script written to sendmail along with attachment in html format.
The code is
export MAILFROM="abc@abc.com"
export MAILTO="abc@abc.com"
export CONTENT="./GRP_SPI_ERR.html"
export SUBJECT="TEST EMAIL: TESTING HTML"
{
print - "From: $MAILFROM"
print - "To: ${MAILTO}"... (3 Replies)
Hi, Guru
i had configure in my two server to send out the email.
One of the server able to send in the reasonable timing. but another not, it delay almost one day or two days but mostly not send at all.
below is the syslog when i try to send out the mail.
GOOD Server
Dec 28 11:29:39... (5 Replies)
Hi all,
we are using solaris 10. we need to increase every users mail boxes size as all users mail boxes got filled..Please help..its urgent..
Thanks in advance.. (1 Reply)
Hi Gurus,
I have been tampering around with sendmail for the past one week and seem to make little progress. Given below is an abstract of the issue.
I have a Fedora 12 server(A VM on vitual Box bridged with a Windows XP host) which has to act as a SMTP server and have accordingly put up the... (8 Replies)
Hi Every One,
one of our server configuration on sendmail config
we are using SMAR_HOST
###
define(`SMART_HOST', 'mail.xxx.com')
and /etc/sysconfig/sednmail DAEMON is setted to NO
so let me know why sendmail is not working for this server
any this else u need please do let me know (0 Replies)
Hi,
I'm using sendmail version 8.13.8-8.1.el5_7. I'm pretty new to it. The servera are running RHEL 5.8. My question basically is that I would want to know is there a way to change the from address. I would be able to change it using the return address in mailx command. However I would like to... (3 Replies)
Dear All ,
I have some problem in Sendmail , where it was sending mails perfectly fine with the Ip address of the client machine.
But suddenly there was an issue , the SMTP takes the IP of the bond1 interface.
So the IP could not get validated in the relay server.
So how should i send... (1 Reply)
Discussion started by: jegaraman
1 Replies
LEARN ABOUT OPENSOLARIS
domainname
domainname(1M) System Administration Commands domainname(1M)NAME
domainname - set or display name of the current domain
SYNOPSIS
domainname [name-of-domain]
DESCRIPTION
Without an argument, domainname displays the name of the current domain name used in RPC exchanges, usually referred to as the NIS or NIS+
domain name. This name typically encompasses a group of hosts or passwd entries under the same administration. The domainname command is
used by various components of Solaris to resolve names for entries such as are found in passwd, hosts and aliases. By default, naming ser-
vices such as NIS and NIS+ use domainname to resolve names.
With appropriate privileges (root or an equivalent role [see rbac(5)]), you can set the name of the domain by specifying the name as an
argument to the domainname command.
The domain name for various naming services can also be set by other means. For example, ypinit can be used to specify a different domain
for all NIS calls. The domain name of the machine is usually set during boot time through the domainname command by the svc:/system/iden-
tity:domain service. If the new domain name is not saved in the /etc/defaultdomain file, the machine reverts to the old domain after it
reboots.
The sendmail(1M) daemon, as shipped with Solaris, and the sendmail implementation provided by sendmail.org (formerly referred to as "Berke-
ley 8.x sendmail") both attempt to determine a local host's fully qualified host name at startup and both pursue follow-up actions if the
initial search fails. It is in these follow-up actions that the two implementations differ.
Both implementations use a standard Solaris or Unix system call to determine its fully qualified host name at startup, following the name
service priorities specified in nsswitch.conf(4). To this point, the Solaris and sendmail.org versions behave identically.
If the request for a fully qualified host name fails, the sendmail.org sendmail sleeps for 60 seconds, tries again, and, upon continuing
failure, resorts to a short name. The Solaris version of sendmail makes the same initial request, but then, following initial failure,
calls domainname. If successful, the sleep is avoided.
On a Solaris machine, if you run the sendmail.org version of sendmail, you get the startup behavior (omitting the domainname call)
described above. If you run the Solaris sendmail, the domainname call is made if needed.
If the Solaris sendmail cannot determine the fully qualified host name, use check-hostname(1M) as a troubleshooting aid. This script can
offer guidance as to appropriate corrective action.
FILES
/etc/defaultdomain
/etc/nsswitch.conf
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO NIS+(1), nischown(1), nispasswd(1), svcs(1), check-hostname(1M), hostconfig(1M), named(1M), nisaddcred(1M), sendmail(1M), svcadm(1M),
ypinit(1M), sys-unconfig(1M), aliases(4), defaultdomain(4), hosts(4), nsswitch.conf(4), passwd(4), attributes(5), rbac(5), smf(5)NOTES
The domainname service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/identity:domain
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
SunOS 5.11 8 Mar 2006 domainname(1M)