On 3/6/2014 11:08 AM, Jay G. Scott wrote:
> 
> The maillog says this, and I believe it:
> 
> Mar 5 08:22:02 ns5.arlut.utexas.edu sendmail[5427]: s25EM0Zg005419: 
> to=<u...@xxx-xxxx.com>, delay=00:00:01, xdelay=00:00:00, mailer=relay, 
> pri=1081946, relay=ns2.arlut.utexas.edu. [146.6.211.1], dsn=5.1.3, 
> stat=Service unavailable
> 

The above is from sendmail(TM) not postfix.  Uninstall/disable sendmail.

> 
> But the user's bounce msg said:
> 
> ns2.arlut.utexas.edu #<ns2.arlut.utexas.edu #5.1.3 SMTP; 501 5.1.3 Bad 
> recipient address syntax>

It's not unusual for a mail client to "transform" error text, for
example, to display a message in the local language. The 5.1.3
status code is preserved.


> 
> However, that address is okay -- sendmail -bv says it's deliverable.

If that's postfix, it may be using a different delivery path. Or
maybe the problem got fixed.

> 
> So....  is this disconnect between service availability and what the
> user sees normal?  or fixable?

Current behavior is no indication of historical behavior, unless you
have repeatable and consistent results.

"A" always answers "foo"
"B" always answers "bar"
is something to investigate. Otherwise, chalk it up to a temporary
external error.




  -- Noel Jones

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