+++ Rajat Pandit [linux-india] <13/12/01 22:52 +0530>:
> this one is just a more general question, i use sendmail on the linux server
> to send mail from all the windows clients that use outlook express. the
> header of the mail that is sent shows the servers information, which is not
> registered to the internic ( a made up domain name actually) .
Yeah, so what happens?
> even though (i feel) that it speeds up the mail sending process dramatically,
> does it in any way affect the authenticity of the where the mail came from.
> i mean this way, any one on the windows client can fake to use anybodies
> email address and send a mail.. i know pgp and gpg are good suggestions, but
> do you know of someother better way.
This is a feature of [E]SMTP - and there are lots of legitimate uses for it
(for example your staff member has a yahoo account he pops down to outlook
express, and uses your local smtp server to send out mail).
If you feel someone is forging mail etc, the solution is social, not
technical. Have an acceptable use policy, and enforce it strictly.
-srs
--
Suresh Ramasubramanian <----> mallet <at> efn dot org
EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin
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