sendmail: how to configure sendmail on ubuntu?

configuration, sendmail, ubuntu

Solution

When you typed in `sudo sendmailconfig`, you should have been prompted to configure sendmail.

For reference, the files that are updated during configuration are located at the following (in case you want to update them manually):

/etc/mail/sendmail.conf
/etc/cron.d/sendmail
/etc/mail/sendmail.mc

You can test sendmail to see if it is properly configured and setup by typing the following into the command line:

$ echo "My test email being sent from sendmail" | /usr/sbin/sendmail myemail@domain.example

The following will allow you to add smtp relay to sendmail:

#Change to your mail config directory:
cd /etc/mail

#Make a auth subdirectory
mkdir auth
chmod 700 auth

#Create a file with your auth information to the smtp server
cd auth
touch client-info

#In the file, put the following, matching up to your smtp server:
AuthInfo:your.isp.net "U:root" "I:user" "P:password"

#Generate the Authentication database, make both files readable only by root
makemap hash client-info < client-info
chmod 600 client-info
cd ..

Add the following lines to sendmail.mc, but before the `MAILERDEFINITIONS`. Make sure you update your smtp server.

define(`SMART_HOST',`your.isp.net')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
FEATURE(`authinfo',`hash -o /etc/mail/auth/client-info.db')dnl

Invoke creation sendmail.cf (alternatively run `make -C /etc/mail`):

m4 sendmail.mc > sendmail.cf

Restart the sendmail daemon:

service sendmail restart

Problem

When I searched for configuring sendmail on ubuntu I din't get any clear answer, each of them assume I know what they are talking about, I just want basic configuration to enable email sending, basically I will use it with google app engine to enable mail sending from dev server. I already did this: ``` sudo apt-get install sendmail ``` then ``` sudo sendmailconfig ``` but I don't know what the last one actually did.

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