sendmail

czezz · 07-24-2009, 02:12 AM

I have a Red Hat machine with sendmail.
To send e-mail from command line is more than simple:

Code:

sendmail my@e-mail.com < /home/my/file.txt

Now, what I'd like to do, is to send e-mail using corporate gateway.
The address of it is let's say: corp.mail.com

Any idea how to do this ?

dxangel · 07-24-2009, 06:24 AM

you need to set sendmail to relay to the corporate gateway. You will also need to tell the corporate gateway that it is OK to relay mail from your server.

Details on how to do this should be in a tutorial or the man page.

czezz · 07-24-2009, 07:05 AM

Corporate gateway alrdy knows about that.
The thing is how to force my locally installed sendmail to use that gateway ?

okcomputer44 · 07-24-2009, 08:06 AM

Quote:

Originally Posted by czezz

I have a Red Hat machine with sendmail.
To send e-mail from command line is more than simple:

Code:

sendmail my@e-mail.com < /home/my/file.txt

Now, what I'd like to do, is to send e-mail using corporate gateway.
The address of it is let's say: corp.mail.com

Any idea how to do this ?

Hi,

you will find in /etc/mail/sendmail.mc "smarthost" change this to your corp gateway and rebuild sendmail.

Code:

make clean
make all
make restart

As well as put into access file the corp gateway's address for relay and the corp gateway needs to accept relaying from your box too.

Laz

czezz · 07-24-2009, 11:49 AM

Hey man,
the problem is that I cant see sendmail.mc in /etc/mail dir.
Should I build it some how ?

dxangel · 07-25-2009, 05:00 AM

first, make sure sendmail-cf and m4 RPM packages are both installed

Code:

rpm -qa | grep sendmail-cf
rpm -qa | grep m4

then if its still not there, run a locate

Code:

updatedb
locate sendmail.mc

this README on sendmail configuration files should help you further on your way

http://www.sendmail.org/m4/readme.html

czezz · 07-28-2009, 08:55 AM

Ok, I have added sendmail-cf.
Then edited /etc/mail/sendmail.mc:

Code:

define(`SMART_HOST',`corpo.mail.com')

executed:

Code:

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

Restarted sendmail:

Code:

/etc/init.d/sendmail restart

Now Im looking on tcpdump:

Code:

/usr/sbin/tcpdump host corpo.mail.com

...but cant see any traffic when sending mails.
Any ideas ?