Comments on: Sendmail masquerade outgoing email address

By: Sandeep

Sandeep — Fri, 03 Feb 2012 06:35:07 +0000

Hi Vivek,
Small query about out going mails.
I would like to add some disclaimer message for every outgoing mail form our mail server. Can you please suggest me the best way to do this?

Thanks,
Sandeep.

By: Habib Mumin

Habib Mumin — Mon, 02 Jan 2012 18:21:17 +0000

To allow user root to send email and use masquerade domain, in sendmail.cf the line beginning

C{E}root

remove word ‘root’ and you have

C{E}

restart sendmail as per above instructions.

There is no need to edit hosts file.

By: jeffrey smith

jeffrey smith — Tue, 21 Jun 2011 15:59:05 +0000

I managed to get this working by doing the following.

change you /etc/hosts file so the first entry with a . for 127.0.01 is the domain your trying to masquerade i.e

127.0.0.1 server1 server1.domain.com server1.domain.local

Then chnage the entries so they are.

MASQUERADE_AS(domain.com)dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MASQUERADE_DOMAIN(localhost)dnl

As stated above this only works for non root users.

By: Josh from America

Josh from America — Wed, 06 Apr 2011 20:08:21 +0000

This absolutely does not work, in any capacity whatsoever.

By: Salam

Salam — Sun, 07 Nov 2010 19:45:56 +0000

I followed all instructions, added the 4 lines, added an alias to my root in usersgeeneric table
root myemail@mydomain.com

Note : I already have the following 4 lines in my sendamail.cf
dnl MASQUERADE_DOMAIN(localhost)dnl
dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl
dnl MASQUERADE_DOMAIN(mydomain.lan)dnl

which I didnt touch.
Whenever I issue the following command
echo “hello worls” | mail -s “Firstmail” myscondemail@anotherdoamin.fr

I get right away an email for root indicating :

The following addresses had permanent fatal errors —–

(reason: 550 5.1.8 your MAIL FROM is refused for this recipient : 553 sorry, your envelope sender domain must exist (#5.7.1))

By: ipkwena

ipkwena — Tue, 14 Sep 2010 19:11:17 +0000

Thanks for the article. Now I have managed to have my Linux box send out emails. However, I have not resolved masquerading the user name. There must be a tutorial somewhere.

Regards.

By: vmunix

vmunix — Thu, 12 Aug 2010 17:21:06 +0000

The article does not mention how to masquerade the username.

By: Anon

Anon — Wed, 07 Jul 2010 10:11:54 +0000

To allow root to masquerade (eg: for logwatch) in sendmail.mc change:

EXPOSED_USER(`root’)dnl

dnl EXPOSED_USER(`root’)dnl

This command bypasses masquerading for the root user, which makes it very confusing when testing this from the root account.

By: J James

J James — Tue, 18 May 2010 20:24:42 +0000

One more thing needs to done, if sending mail as root
#C{E}root – comment out

By: josh from america

josh from america — Tue, 11 May 2010 19:01:27 +0000

sendmail totally ignores all changes related to masquerade, also know as:

“does not work”, or “tutorial non- helpfull”

By: Shai

Shai — Tue, 11 May 2010 07:19:16 +0000

Make sure that you have placed the above 4 lines above the MAILER lines at the end or you’ll get an error when issuing the m4 cmd from cli

By: Mrmartin

Mrmartin — Wed, 17 Feb 2010 18:36:30 +0000

Great, simple article, how would the masquerading work if I’m using Apache virtual hosts ie more than 1 domain on the server. If a php app from one virtual host sends mail using the PHP mail() function how do I set which from address is used?

Thanks

By: ifti

ifti — Mon, 16 Feb 2009 05:58:33 +0000

i m facing the same problem as mentioned by didier , actually i have set a linux monitoring server which monitors network devices,if any device is down it sends emails on our local domain using sendmail, the outgoing mails are sent from this server like root@localhos.localdomain i want to masquerade it to say test@xyz.com, nix and didier any help will be highly appreciable….
thanks

By: didier

didier — Mon, 20 Nov 2006 20:17:50 +0000

Hi nixcraft,

No I haven’t set this up. To be fully honest, I am not familiar with virtual unix user name mapping. Can you explain a little bit more.

I did try to use the virtusertable file but it didn’t to work for outgoing email. The problem I am trying to solve is EXACTLY the on you mention in your post: I have a machine (prod1) and a user (prod) and I want to send emails as invitation@.com (I am just interested in outgoing email… and no, I am not a spammer :-)

The masquerade works for the domain name, but for the user, I ended up having to create a unix user ‘invitation’ on my box and sudo to invitation before sending the emails… It works fine but I am sure there is a better/simpler way…

Thanks for your reply btw.
-Didier

By: nixcraft

nixcraft — Fri, 17 Nov 2006 13:01:33 +0000

Do you have virtual UNIX user name mapping like:
user1@domain.com drealuser

???

By: didier

didier — Thu, 16 Nov 2006 23:14:02 +0000

Nice. So, this explains how to ‘hide’ the domain name. But what about the user name ? With the changes you describe, it still shows our real unix username. Am I missing something here ?

thanks for your help.
-Didier