Best practice: sendmail and SMTP auth

Derek Ragona derek at
Thu Mar 13 00:05:53 UTC 2008

At 02:19 PM 3/12/2008, Doug Poland wrote:
>Not sure if this is the most appropriate place for this question, but
>since all my servers are FreeBSD 6.x/7.x, I'll give it a go...
>I am considering setting up SMTP auth on a number of sendmail
>instances that I control.  After much googling and reading, it is not
>clear to me that a server with SMTP auth configured/enabled can relay
>mail in both auth and non-auth modes.
>If one sendmail configuration cannot accommodate both SMTP auth and
>access.db, does one setup a dedicated SMTP auth host with a SMART_HOST
>option and feed incoming email to an non-auth instance of sendmail?
>Sorry if my terminology is ambiguous, I'm not a sendmail professional
>by day.

You can set up sendmail to do both auth and non-auth.  However best 
practice is to use auth only to control any spam relaying.  Check the website FAQ's for setting this up.  You will want to probably 
use cyrus-sasl or cyrus-sasl2 ports along with sendmail.


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