On 9/17/2015 9:17 PM, Tom Browder wrote:
> I have a brand new installation, from  source, of Postfix 3.0.2 on
> Debian 7, 64-bit.  I successfully did the initial local tests for
> postfix as described in "The Book of Postfix."  

Please note the book is now rather dated.  While the examples and
general concepts are still valuable, lots of things have changed
since then.  The official up-to-date documentation is supplied with
the source code, and also available on the postfix web page
http://www.postfix.org/documentation.html

At a minimum, you should review the various RELEASE_NOTES to see
what has changed since the book was published.

> (Note that I have
> virtual servers but have not yet configured postfix for handling
> them.) Then I made my first test for outbound mail to my personal
> gmail address and the mail.info file shows this:
> 
> Sep 18 01:57:18 dedi2 postfix/smtpd[3154]: connect from
> mail-am1hn0254.outbound.protection.outlook.com[157.56.112.254]

This is the smtpd process, which handles incoming mail.  Someone who
uses Microsoft services is trying to send mail to your server.

> Sep 18 01:57:19 dedi2 postfix/smtpd[3154]: NOQUEUE: reject: RCPT from
> mail-am1hn0254.outbound.protection.outlook.com[157.56.112.254]: 454
> 4.7.1 <jc.ch...@mygnus.com>: Relay access denied;

"Relay access denied" means that postfix is not configured to
receive mail for the mygnus.com domain, and the recipient is rejected.
http://www.postfix.org/BASIC_CONFIGURATION_README.html#mydestination
http://www.postfix.org/VIRTUAL_README.html#canonical
http://www.postfix.org/ADDRESS_CLASS_README.html
http://www.postfix.org/postconf.5.html#smtpd_relay_restrictions

> from=<murray.he...@tcd.ie> to=<jc.ch...@mygnus.com> proto=ESMTP
> helo=<emea01-am1-obe.outbound.protection.outlook.com>

more details from the rejection.

> Sep 18 01:57:19 dedi2 postfix/smtpd[3154]: NOQUEUE: reject: RCPT from
> mail-am1hn0254.outbound.protection.outlook.com[157.56.112.254]: 454
> 4.7.1 <jk.ch...@mygnus.com>: Relay access denied;
> from=<murray.he...@tcd.ie> to=<jk.ch...@mygnus.com> proto=ESMTP
> helo=<emea01-am1-obe.outbound.protection.outlook.com>

A second rejected recipient...

> Sep 18 01:57:19 dedi2 postfix/smtpd[3154]: disconnect from
> mail-am1hn0254.outbound.protection.outlook.com[157.56.112.254] ehlo=1
> mail=1 rcpt=0/2 quit=1 commands=3/5

... and the outlook.com client disconnects.

Note these are 4xx deferrals, not 5xx rejects, so the sending client
will likely retry delivery periodically over the next several days.

> 
> And I have received no mail at my gmail address.

The above logging shows attempts to receive mail.  No logging here
about sending mail.

> 
> Looking at the messages above I note that the address
> <jk.ch...@mygnus.com> is at one of my virtual hosts but I have no user
> by that name (and the IP address 157.56.112.254 is not known to me.
> 
> I have set up my DNS records according to advice from this mailing list.
> 
> I will read more in the book tonight but hope someone can point me in
> the right direction while I continue to study the problem.

Basic debugging info:
http://www.postfix.org/DEBUG_README.html

And to get help from this list:
http://www.postfix.org/DEBUG_README.html#mail



  -- Noel Jones

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