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Full Discussion: Sendmail - issue within DMZ for some servers but not all
Top Forums UNIX for Beginners Questions & Answers Sendmail - issue within DMZ for some servers but not all Post 303033262 by dakelly on Tuesday 2nd of April 2019 10:42:04 AM
Old 04-02-2019
Sorry I am out the office for a while..... so not in the office to check this out.

I done this:
Code:
/etc/init.d/sendmail stop
cp sendmail.mc hostname.mc
cp sendmail.cf sendmail.cf.25Mar2019
.... amended hostname.mc
m4 hostname.mc > hostname.cf
cp -p hostname.cf sendmail.cf
/etc/init.d/sendmail start

but I made 2 new servers from ubuntu 18.04 and they worked fine - send emails fine
but the ones that updated from 16.04 to 18.04 don't send... not sure if it is something to do with how networking is set up on 18.04 and 16.04 as the are different.
18.04 uses a yaml file and the 16.04 does not....
 

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LEARN ABOUT SUNOS

check-hostname

check-hostname(1M)					  System Administration Commands					check-hostname(1M)

NAME

       check-hostname - check if sendmail can determine the system's  fully-qualified host name

SYNOPSIS

	/usr/sbin/check-hostname

DESCRIPTION

       The   check-hostname script is a migration aid for sendmail(1M).  This script tries to determine the local host's fully-qualified host name
       (FQHN) in a manner similar to  sendmail(1M). If	check-hostname is able to determine the FQHN of the local host, it reports success. Other-
       wise,  check-hostname reports how to reconfigure the system so that the	FQHN can be properly determined.

FILES

       /etc/hosts	       Host name database

       /etc/nsswitch.conf      Name service switch configuration file

       /etc/resolv.conf        Configuration file for name server routines

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsndmu 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sendmail(1M), hosts(4), attributes(5)

SunOS 5.10							    10 Nov 2003 						check-hostname(1M)
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