force smtp auth

Jeffrey Goldberg jeffrey at
Mon Feb 12 15:24:23 UTC 2007

On Feb 11, 2007, at 8:27 PM, Doug McComber wrote:

> This is for a web server that runs Drupal.  I don't use the server for
> email as I have that hosted elsewhere. I just want Drupal to be able
> to send email (from localhost) via smtp auth. This is working right
> now except mail can also be sent without using smtp auth.

I'm not entirely sure what you are asking.  Is all the mail that  
Drupal sends from localhost?  That is, is there a need for Drupal to  
listen on port 25 (or 587) at all?   If there is no need for  
listening, then sendmail should be set up as a client only and listen  
only to localhost.  I don't work with sendmail on FreeBSD so I can't  
say exactly how you do this, but getting something like

  DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA')

in the .mc source for your should tell it to listen to  
daemon host.

If you do want to connect to the machine remotely and have it relay  
mail for you, then having something like

  DAEMON_OPTIONS(`Name=MSA, Port=587, M=E')

in the mc file that is the source for your file should do  
the trick.  That tells sendmail to listen on port 587 (smtp  
submission port) and require authentication.  The M=E is what  
requires the authentication.

Don't add that by hand, it is already nicely set up if  you use


If you want to force authentication even on localhost connections,  
then I guess something like

  DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA, M=E')

should do the trick.

Poking around I see that the src mc file is /usr/src/etc/sendmail/

However, there is a good chance that I've answered the wrong  
question, because I'm not sure what it is that you are after.

And someone who is familiar with managing sendmail on FreeBSD will be  
able to tell you the FreeBSD way of doing things.


Jeffrey Goldberg              

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