hi,

I want to edit my sendmail.mc so that mail is sent via a smarthost.

I know I must uncomment/change the line

dnl #define(`SMART_HOST',`mail.isp.com')dnl

but the server I wish to use requires me to authenticate.

Is this possible? Where would I put the credentials?

Thanks

seabro

Very possible, lots on Google related to this, too.

First, set your authorization informations by adding following line to /etc/mail/access file:
Obviously, replace USERNAME and PASSWORD with the right values. Set the mail host name accordingly, too.

Then, add the following lines to /etc/mail/sendmail.mc, if they're not there already. You've mentioned the smart_host line already.
If you don't enable the access_db feature, it WON'T WORK. Update the sendmail.mc file, and restart sendmail. Check out sendmail config docs, to change the authentication method. Here, it's Method:PLAIN (for clear text), but there are other values it can take.

1 members found this post helpful.

Hey TB0ne,

Thanks very much for the reponse.

I have a small problem.

I implemented the changes suggested in /etc/mail/access then I looked at /etc/mail/sendmail.mc and I saw:

dnl #
FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
dnl #


So I did:

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

then

service sendmail restart.

I tried sending a mail from the command line then I checked /var/log/maillog and I see:

Jan 7 11:59:24 [213 sendmail[18683]: o07BxO5M018683: to=xx@xxx.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30060, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (o07BxORC018684 Message accepted for delivery)
Jan 7 11:59:44 [213 sendmail[18686]: o07BxORC018684: to=<xx@xxx.com>, ctladdr=<root@213.xxx.xxx.188> (0/0), delay=00:00:20, xdelay=00:00:20, mailer=esmtp, pri=120333, relay=mx0.123-reg.co.uk. [194.154.164.157], dsn=5.0.0, stat=Service unavailable
Jan 7 11:59:44 [213 sendmail[18686]: o07BxORC018684: o07BxiRC018686: DSN: Service unavailable

(and the email did not arrive).

So I went ahead and added:

FEATURE(`access_db')

right below the existing:
dnl define(`SMART_HOST',`mail.authsmtp.com')dnl

then I:

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

and tried again unsuccessfully.


If I am not mistaken, I thought I should see evidence of use of smart host in the log file? but I am not.

Your help is appreciated.

Seabro

Whoops...I don't think I mentioned the part where you have to generate a new access.db file. My bad:
Then restart Sendmail, and give it another shot.

1 members found this post helpful.

Thanks TBOne, I will give it a try.