Question about smtplib, and mail servers in general.

Christos Georgiou tzot at
Mon Sep 26 18:34:53 CEST 2005

On Tue, 20 Sep 2005 16:48:41 +0200, rumours say that Piet van Oostrum
<piet at> might have written:

>And most smtp servers that I know also pass mail from any from-address to
>any to-address if the IP number of he client machine belongs to a trusted
>range (usually the range that belongs to the ISP). So I can send both my
>private mail and my work mail from both my home ISP's smtp server and my
>work's smtp server (but only if I am at the proper location).

You might start having troubles, though, as soon as SPF checks get more

Say your work mail is piet at, and your private mail is
piet at; if you send email through your office mail server
with the envelope "MAIL FROM: piet at\n", then some (and
eventually many) receiving servers shall ask for their
SPF record, and since your office mail server won't probably show up as
a valid email sender from , your email will get

That's a good thing.
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians

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