Checking in...

[Bill Campbell]

On Mon, Apr 04, 2011, Nancy Palmquist wrote:
>Bill,
>
>Your direct wrandell at fptech.com email was returned also.  And 
>sales at fptech.com was also returned.
>
>Is the fptech.com mail all down?

I don't think so, but it seems to be doing some kind of checking
of the sending host/domain that doesn't like our servers (SPF
perhaps?).  The specific message coming back to our postfix mail
server is:

	451 Could not complete sender verify callout (in reply to end of
	DATA command))

We don't have SPF records for any of our domains, specifically
because publishing them has often caused more problems than it's
worth.  SPF, DKIM, and other methods also can have problems with
mail from mailing lists where the sender's address is not the
same as the address of the mailing list server.

Most mail servers have the ability to whitelist specific IP
addresses or CIDR blocks of known good guys so they don't rely
totally on things like SPF or DKIM signatures.

Bill
-- 
INTERNET:   bill at celestial.com  Bill Campbell; Celestial Software LLC
URL: http://www.celestial.com/  PO Box 820; 6641 E. Mercer Way
Voice:          (206) 236-1676  Mercer Island, WA 98040-0820
Fax:            (206) 232-9186  Skype: jwccsllc (206) 855-5792

The budget should be balanced, the Treasury should be refilled, public
debt should be reduced, the arrogance of officialdom should be
tempered and controlled, and the assistance to foreign lands should be
curtailed lest Rome become bankrupt. People must again learn to work,
instead of living on public assistance. -- Cicero - 55 BC