RE: sendmail

She's set up as one, and the box is open to the internet (since it relayed mail to gmail). It may not accept connections from outside the server/local network, but it is still an open relay.

Rob Marti
Systems Administrator
Sam Houston State University
936-294-3804 // rjm002@xxxxxxxx


-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Barry Brimer
Sent: Wednesday, September 03, 2008 9:48 AM
To: General Red Hat Linux discussion list
Subject: RE: sendmail

He telnetted to 127.0.0.1 25 .. which does not make him an open relay.

Quoting "Marti, Rob" <RJM002@xxxxxxxx>:

You're connecting from somewhere other than gmail.com and saying the mail is
coming from gmail.com. You're trying to relay mail without authenticating,
which I would bet google has disabled. Your MTA A is currently set up as an
open relay (unless you're at gmail.com). Read
http://en.wikipedia.org/wiki/Open_mail_relay to see why this is bad.

Rob Marti

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx]
On Behalf Of Joy Methew
Sent: Wednesday, September 03, 2008 9:11 AM
To: General Red Hat Linux discussion list
Subject: sendmail

here is two systems both are "mta" A and B with sendmail.
A is mine and B is gmail mat.
when i telnet my mta means A --->>telnet 127.0.0.1 25
helo hi
mail from:root@xxxxxxxxx <from%3Aroot@xxxxxxxxx>
rcpt to:ml4joy@xxxxxxxxx <to%3Aml4joy@xxxxxxxxx>
i recived mail very easly.
it means my mta "A" telnet indirectaly to gmail mta.
but when i try to telnet directly to gmail mta its give error like.


220 mx.google.com ESMTP t26si1434066ele.4
helo gmail.com
250 mx.google.com at your service
mail from:ml4joy@xxxxxxxxx <from%3Aml4joy@xxxxxxxxx>
555 5.5.2 Syntax error t26si1434066ele.4

Any idea why the "Syntax error".?

Thanks
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