Why did update cause "requires valid sender domain" problem?

E

E. Thomas Wood

Outlook (2000, SP3) has started bouncing back all messages that I send out
with the message:

"450 [TEMPFAIL] <recipient's domain>.com requires valid sender domain"

I'm fairly certain this problem arose from an automatic update that came in.
My POP and SMTP settings are as they should be, and the sending address shown
is the one I have always used, at a personal domain whose mail bounces to my
ISP address. It could be that the update made Outlook decide my domain is not
"valid." If so, how do I override that decision?

Thanks,
Tom

tom _at_ the.wood.family _dt_ org
 

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