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Full Discussion: Sendmail - relay Host unknown since adding dns
Operating Systems HP-UX Sendmail - relay Host unknown since adding dns Post 302949413 by MadeInGermany on Friday 10th of July 2015 11:35:28 AM
Old 07-10-2015
Code:
host 192.168.1.39

and
Code:
getent hosts 192.168.1.39

should give the same hostname.
getent (if available on your system) uses the libc defaults that is normally /etc/nsswitch.conf, eventually through a nscd cache.

For ipnodes (Solaris?) I recommend only "files". In few configurations "files dns" can make sense, but always "files" first, and "localhost" should be in /etc/hosts file.
(Not relevant here: also services should be "files" first, for performance reason.)
Do you have nscd with hosts caching (and ipnodes caching) enabled? (See /etc/nscd.conf and command nscd -g) Then restart nscd.
 

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LEARN ABOUT SUSE

mailto.conf

mailto.conf(5)							    Apple Inc.							    mailto.conf(5)

NAME

       mailto.conf - configuration file for cups email notifier

DESCRIPTION

       The mailto.conf file defines the local mail server and email notification preferences for CUPS.

       Each line in the file can be a configuration directive, a blank line, or a comment. Comment lines start with the # character.

DIRECTIVES

       Cc cc-address@domain.com
	    Specifies an additional recipient for all email notifications.

       From from-address@domain.com
	    Specifies the sender of email notifications.

       Sendmail sendmail command and options
	    Specifies  the  sendmail  command  to use when sending email notifications. Only one Sendmail or SMTPServer line may be present in the
	    mailto.conf file. If multiple lines are present, only the last one is used.

       SMTPServer servername
	    Specifies a SMTP server to send email notifications to. Only one Sendmail or SMTPServer line may be present in the	mailto.conf  file.
	    If multiple lines are present, only the last one is used.

       Subject subject-prefix
	    Specifies a prefix string for the subject line of an email notification.

SEE ALSO

       classes.conf(5), cupsd(8), cupsd.conf(5), mime.convs(5), mime.types(5), printers.conf(5),
       http://localhost:631/help

COPYRIGHT

       Copyright 2007-2009 by Apple Inc.

12 July 2006							       CUPS							    mailto.conf(5)
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