To: NetBSD netbsd-help mailing list <netbsd-help@netbsd.org> Date: 03/24/2004
To: NetBSD netbsd-help mailing list <netbsd-help@netbsd.org> Date: 03/24/2004
> How do I configure a Smart Host in Sendmail ? (that means that all outgoing > emails are going to another mailserver)
You can configure a smart host by changing the 'DS' entry in sendmail.cf. My smart host is called orthanc, so my /etc/mail/sendmail.cf contains the line:
DSorthanc
However, it's probably better to generate the sendmail.cf from an mc file in /usr/share/sendmail/cf:
copy the netbsd-proto.mc file:
cp netbsd-proto.mc mydomain.mc
add the smart host line:
define(`SMART_HOST', mysmarthost)dnl
build the cf file with:
make mydomain.cf
backup original cf:
mv /etc/mail/sendmail.cf /etc/mail/sendmail.cf.dist
copy new cf:
mv mydomain.cf /etc/mail/sendmail.cf.dist
restart sendmail:
/etc/rc.d/sendmail restart
Julian Coleman @coris.org.uk
documented on: 2007.12.21
http://www.experts-exchange.com/Operating_Systems/Linux/Linux_Administration/Q_21489534.html
For some reason it appears that the mailer (ESMTP according to /var/log/maillog) is talking to a SMTP server which it is detecting by DNS. This is an SMTP server at another one of our sites in another country. I dont want it to use this SMTP server.
How do I force the server to use an SMTP server that I want?
marc15101
I reinstalled Sendmail onto the server and then added the following line to the sendmail.mc file:
define(`SMART_HOST', `mail.server')dnl
Recompiled the sendmail.cf file using this file.
Restarted sendmail and now everything works.
marc15101 Date: 07/14/2005
From: Jeff Kinz <jkinz kinz org> To: psyche-list redhat com Date: Sun, 11 May 2003 12:12:01 -0400
> Could someone who has a single box set up to relay their outgoing mail > through their ISP using a dial-up and masquerading send me a copy of the > sendmail.mc file they used.
Here is an example sendmail.mc.
It uses a smarthost based at a Cable ISP for all mail routing. It has also been used with a dialup ISP tha same way, - nothing changes.
divert(-1) dnl This is the sendmail macro config file. If you make changes to this file, dnl you need the sendmail-cf rpm installed and then have to generate a dnl new /etc/sendmail.cf by running the following command: dnl dnl m4 /etc/mail/sendmail.mc > /etc/sendmail.cf dnl include(`/usr/share/sendmail-cf/m4/cf.m4') VERSIONID(`linux setup for Red Hat Linux')dnl OSTYPE(`linux') define(`confDEF_USER_ID',``8:12'')dnl dnl dnl Change "mail.attbi.com" in the following entry to whatever your ISP has dnl their mail srvice setup as. This is the same thing you put in any dnl Windows email program (Like Eudora, Outlook, Netscape etc.. ) dnl to set up email in those programs. Post your questions to the list dnl so everyone, including me, can give you more feedback. dnl define(`SMART_HOST',`mail.attbi.com')dnl undefine(`UUCP_RELAY')dnl undefine(`BITNET_RELAY')dnl define(`confAUTO_REBUILD')dnl define(`confTO_CONNECT', `1m')dnl define(`confTRY_NULL_MX_LIST',true)dnl define(`confDONT_PROBE_INTERFACES',true)dnl define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')dnl define(`ALIAS_FILE', `/etc/aliases')dnl dnl define(`STATUS_FILE', `/etc/mail/statistics')dnl define(`UUCP_MAILER_MAX', `2000000')dnl define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl define(`confPRIVACY_FLAGS', `novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl dnl TRUST_AUTH_MECH(`DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl define(`confAUTH_MECHANISMS', `DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl define(`confTO_QUEUEWARN', `4h')dnl dnl define(`confTO_QUEUERETURN', `5d')dnl dnl define(`confQUEUE_LA', `12')dnl dnl define(`confREFUSE_LA', `18')dnl dnl FEATURE(`redirect')dnl FEATURE(`always_add_domain')dnl FEATURE(`use_cw_file')dnl dnl FEATURE(`local_procmail')dnl FEATURE(`nouucp',`reject')dnl FEATURE(`access_db')dnl dnl MAILER(procmail)dnl dnl MAILER(smtp)dnl dnl dnl Who do i make myself look like? dnl if I am only using my cable ISP for dnl email then I should masquerade as part of my cable domain. dnl dnl MASQUERADE_AS(attbi.com)dnl dnl dnl if I have my own website, then I should masquerade as it dnl MASQUERADE_AS(MyDomain.net)dnl FEATURE(`allmasquerade')dnl FEATURE(`masquerade_envelope')dnl dnl FEATURE(delay_checks)dnl FEATURE(`no_default_msa',`dnl')dnl FEATURE(`smrsh',`/usr/sbin/smrsh')dnl FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl FEATURE(use_ct_file)dnl FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db',`hash -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl define(`confCT_FILE', `/etc/mail/trusted-users') FEATURE(`use_ct_file') EXPOSED_USER(`root')dnl dnl This changes sendmail to only listen on the loopback device 127.0.0.1 dnl and not on any other network devices. Comment this out if you want dnl to accept email over the network. dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA') dnl NOTE: binding both IPv4 and IPv6 daemon to the same port requires dnl a kernel patch dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6') dnl We strongly recommend to comment this one out if you want to protect dnl yourself from spam. However, the laptop and users on computers that do dnl not have 24x7 DNS do need this. dnl FEATURE(`accept_unresolvable_domains')dnl dnl FEATURE(`relay_based_on_MX')dnl MAILER(smtp)dnl MAILER(procmail)dnl Cwlocalhost.localdomain
Jeff Kinz
Newsgroups: comp.mail.sendmail Date: Thu, 07 Sep 2006 22:06:29 +0200
>> If you mean to be able to use different user/password configurations >> (AuthInfo) for the same smarthost or mailertable targets: this is not >> possible. > > Ok, just to make it crystal clear, > > So if my box is used by more than 2 users, they all have to share the > same user/password configurations for the smarthost, which will end up > with the same from field. Ie, there is no way for them to specify their > own from field? (I'm talking about smarthosts like gmail that do not > allow you to set your own from field).
Generally the envelope sender and the mail From: header are independent from authentication data used to auth against a foreign server, setup as your smarthost. Both the envelope sender as well the From: header are typically set by a proper configuration of the mail client. From that point it can differ between different users. On the other hand the provider of the MTA which you want to use as smarthost could have configured his system, so that the SMTP AUTH data (AuthInfo on your system, user) has to match the address the user tries to send mail as through that other system. If thats the case, you have not much luck with Sendmail (Postfix since 2.3 provides Sender-dependent SASL authentication support; for Exim there are configuration tricks).
Alexander Dalloz
> So if my box is used by more than 2 users, they all have to share the > same user/password configurations for the smarthost, which will end up > with the same from field. Ie, there is no way for them to specify their > own from field? (I'm talking about smarthosts like gmail that do not > allow you to set your own from field).
The suggestions below *MAY* work [no guarantees whatsoever]
You may try to select different "pseudo smart host" based (e.g.) on envelope sender or authentication credentials used during local submission. "Pseudo smart hosts" will be a CNAME to smtp.gmail.com in your local DNS domain (BTW smtp.gmail.com is a CNAME). You may create one wild-card CNAME *.gmail.smtp.example.com for all pseudo smart hosts. It should allow you to specify different outgoing AUTH per "pseudo smart host".
In case of problems with connections caching use custom mailer (variation of esmtp mailer) for smart hosts sending one message per connection.
Relay selection based on envelope sender had been implemented in (discontinued) smarttable. It has been never supported by sendmail.org.
P.S. "Right way" would require changes in sendmail source code: * selecting outgoing authentication credentials based on more data * caching of outgoing connections
BTW It will be better in sendmail X, will not it? ;-)
Andrzej Adam Filip
Newsgroups: comp.mail.sendmail Date: Mon, 11 Sep 2006 18:18:51 +0200
> I have a Linux machine (Fedora Core 5) with me and my family setup as > users basically using our first names. We have a dialup account with > Verizon and we use four email addresses with that account. Obviously the > ISP email names don't match our user names. > > We can setup the Mozilla and Thunderbird email clients to properly get > and send mail with Verizon, but this doesn't use the local sendmail > daemon. > > Sometimes it would be nice to use the local sendmail with some > applications that for some reason or other may want to send an email > (i.e. a bug report, or a simple copy-n-paste in an emacs buffer). > However, Verizon wants to see and authenticate the email names we have > with the Verizon account, not the local user names. > > So for these simple programs for outgoing mail I want to map: > > (local_user)@localhost.localdomain => (Verizon_user)@verizon.net > > and then authenticate for that Verizon user. > > From the documentation it seems like it is possible to do using > masquerading, masquerade envelope, virtusertable and genericstable, and > the AuthInfo database, but I have been unsuccessful in accomplishing it. > > Then in the "How to use different auth for smarthost" thread I read that > it might not be possible? > > How do I do this? > > Do I need to use postfix or something?
The *ONLY* thing from your "wishlist" *untested* in sendmail.cf is using more than one set of authentication credentials for one smart host based on sending user. As you read in the other thread I think it can be done by sendmail.cf too.
BTW I can get a DNS domain "free of charge" e.g. at dyndns.org
P.S. I have "discontinued" the official page of "smart table". [ routing based on envelope sender email address ]
Andrzej Adam Filip