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Subject: HELO / MAIL FROM vs client
From: Gert-Jan Looy (gjsiemens.nl)
Date: Tue Jul 04 2000 - 08:33:01 CDT

Dear list,

Looking through documentation and FAQ I cannot find out how
to resolve following problem:

Someone connecting from the outside to our firewall-postfix
and then sending mail with "MAIL FROM: someonesiemens.nl" ,
so that the recipient thinks that the mail really comes
from Siemens , which it does not.

What I would like is to match the clients real domain with the domain
entered in the "helo" and "mail from" entries.

Is this possible?

Thanks for your time...

Gert-Jan Looy
Unix sysadm Siemens Netherlands