(Probably) Simple sendmail question

46&2 · 07-31-2005, 01:30 AM

Forgive me if this has been asked a billion times before, but I did RTFM and search the forums but wasn't able to find anything relavant.

I've followed Shilo's guide (fantastic) and have set up a mail and web server. They are both working perfectly, but I have one question about sendmail.

As it currently stands when I send an email to someone, the from address shows up as "chris@slackware.domain.com" where "slackware" is my hostname and "domain" is my actual domain. I'd like to fix it so that it shows up as just "chris@domain.com". Could anyone point me in the right direction?

trickykid · 07-31-2005, 09:50 AM

You'll see something like this in your sendmail.cf file:

Code:

# my official domain name
# ... define this only if sendmail cannot automatically determine your domain
#Dj$w.Foo.COM

That's what you want to change or edit as sendmail is determining your fully qualified domain most likely itself, using the host.domain.com instead of just domain.com

Pete M · 07-31-2005, 10:32 AM

46&2

Another way is to add domain.com to /etc/mail/local-host-names

Sendmail looks here to determine the domains it's responsible for

Just add it as is

Code:

domain.com

Pete

46&2 · 07-31-2005, 02:36 PM

Thank you both for the suggestions. Unfortunately, neither of them worked. trickykid, here is my slackware-sendmail.mc that I used for my sendmail.mc. Is the option you mentioned not in the slackware-sendmail.mc? I have a feeling it's something I'm going to have to enter manually. Anyway, here it is.

Edit: Is it the option I've marked in red?

Code:

dnl# This is the default sendmail .mc file for Slackware.  To generate
dnl# the sendmail.cf file from this (perhaps after making some changes),
dnl# use the m4 files in /usr/share/sendmail/cf like this:
dnl#
dnl# cp sendmail-slackware.mc /usr/share/sendmail/cf/config.mc
dnl# cd /usr/share/sendmail/cf
dnl# sh Build config.cf
dnl#
dnl# You may then install the resulting .cf file:
dnl# cp config.cf /etc/mail/sendmail.cf
dnl#
include(`../m4/cf.m4')
VERSIONID(`default setup for Slackware Linux')dnl
OSTYPE(`linux')dnl
dnl# These settings help protect against people verifying email addresses
dnl# at your site in order to send you email that you probably don't want:
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun,goaway')dnl
dnl# Uncomment the line below to send outgoing mail through an external server:
define(`SMART_HOST',`mail.isp.com')
dnl# No timeout for ident:
define(`confTO_IDENT', `0')dnl
dnl# Enable the line below to use smrsh to restrict what sendmail can run:
dnl FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
dnl# See the README in /usr/share/sendmail/cf for a ton of information on
dnl# how these options work:
FEATURE(`use_cw_file')dnl
FEATURE(`use_ct_file')dnl
FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl
FEATURE(`access_db', `hash -T<TMPF> /etc/mail/access')dnl
FEATURE(`blacklist_recipients')dnl
FEATURE(`local_procmail',`',`procmail -t -Y -a $h -d $u')dnl
FEATURE(`always_add_domain')dnl
FEATURE(`redirect')dnl
dnl# Turn this feature on if you don't always have DNS, or enjoy junk mail:
dnl FEATURE(`accept_unresolvable_domains')dnl
EXPOSED_USER(`root')dnl
dnl# Also accept mail for localhost.localdomain:
LOCAL_DOMAIN(`localhost.localdomain')dnl
MAILER(local)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

shilo · 07-31-2005, 04:31 PM

I use the Pete M method. Lazy me, I reboot (though "/etc/rc.d/rc.sendmail restart" should do the same) and it works. Did you remember to restart sendmail?

46&2 · 07-31-2005, 04:44 PM

Well if it isn't the man himself .. as long as you're in on the thread, thank you so much for the guide. In any case, yes I did restart sendmail with the all powerful:

Code:

/etc/rc.d/rc.sendmail restart

with my /etc/mail/local-host-names looking something like this:

Code:

# names of hosts for which we receive mail
domain.com

Like you, I didn't think a reboot would be necessary. Any other ideas?

Pete M · 07-31-2005, 05:14 PM

46&2

What does your /etc/hosts file look like ?

Pete

46&2 · 07-31-2005, 05:25 PM

The line in red looks rather interesting. What should I change that to?

Code:

                                                                                                                                                                                                                                     
#
# hosts		This file describes a number of hostname-to-address
#		mappings for the TCP/IP subsystem.  It is mostly
#		used at boot time, when no name servers are running.
#		On small systems, this file can be used instead of a
#		"named" name server.  Just add the names, addresses
#		and any aliases to this file...
#
# By the way, Arnt Gulbrandsen <agulbra@nvg.unit.no> says that 127.0.0.1
# should NEVER be named with the name of the machine.  It causes problems
# for some (stupid) programs, irc and reputedly talk. :^)
#

# For loopbacking.
127.0.0.1		localhost
127.0.0.1		slackware.domain.com slackware

# End of hosts.

Pete M · 07-31-2005, 05:36 PM

46&2

Try this way

Code:

127.0.0.1	slackware.domain.com   slackware   localhost

Just this one line, put # in front of 127.0.0.1 localhost just to see if it helps

Unfortunately for this to take effect you will have to reboot

Pete

46&2 · 07-31-2005, 05:41 PM

So you're saying I should make /etc/hosts look something like this:

Code:

# For loopbacking.
#127.0.0.1		localhost
127.0.0.1		slackware.domain.com slackware

and then reboot?

Pete M · 07-31-2005, 05:55 PM

No

Like this

Code:

#127.0.0.1	localhost
127.0.0.1   slackware.domain.com   slackware   localhost

All the "#" does is it gets that line ignored, if it works ok you can then later delete that line

Pete

46&2 · 07-31-2005, 07:56 PM

OK. I changed the /etc/hosts file to look like how you said, and left the "domain.com" entry in the "local-host-names" file. I just tried sending something to my Gmail account and it still shows up as "chris@slackware.domain.com". Something you might be interested to know is that when I install SquirrelMail and tweak the config file, all mail send through SquirrelMail shows up as from @domain.com rather than the fully qualified domain name. Is this something having to do with Pine?

Something else: http://www.sendmail.org/faq/section3.html#3.3

Is that what I should look at doing?

46&2 · 07-31-2005, 08:40 PM

OK. I think I got it to work.

I left the "domain.com" entry in the local-host-names file. From there, I went to the virtusertable in /etc/mail/ and followed the instructions found here: http://www.sendmail.org/virtual-hosting.html

So from what I understood, that was going to route messages sent to chris@domain.com to chris@slackware.domain.com. With that working, I went to the sendmail-slackware.mc file and entered:

Code:

MASQUERADE_AS(domain.com)

It's a rough solution, but it works! Thanks to all of you for the help.

Pete M · 08-01-2005, 01:20 AM

46&2

Code:

It's a rough solution, but it works!

I don't think so from the links you posted it looks like the correct solution, Pine seems to have been the culprit all along

Glad you got it working

Pete