Help required for configuring sendmail

In my university we have several outstations which are connected to
the Internet through different ISPs. One thing is common about all
these is that the ISP gives them a private number, something like
10.0.0.1. Now when I try to setup sendmail from these places they are
not allowed to send the mail as they do not have valid ip number. So,
I tried to relay the mail through the server at the main campus which
has a valid IP number, but even than they can not send the mail. If
someone can help me I shall be very grateful. I have read the sendmail
howto and have added the ip number of the clients as well as their
domain names in the access file with little result. I am running RH linux 9.0

Mahendra

Mahendra Modi wrote:
> In my university we have several outstations which are connected to
> the Internet through different ISPs. One thing is common about all
> these is that the ISP gives them a private number, something like
> 10.0.0.1. Now when I try to setup sendmail from these places they are
> not allowed to send the mail as they do not have valid ip number. So,
> I tried to relay the mail through the server at the main campus which
> has a valid IP number, but even than they can not send the mail. If
> someone can help me I shall be very grateful. I have read the sendmail
> howto and have added the ip number of the clients as well as their
> domain names in the access file with little result. I am running RH linux 9.0

Do they get a deny from the SMTP or do they get a message tehy can't connect?

well, just look inside your sendmail.cf file ... new sendmail versions
only allow relay from 127.0.0.1.

by default it allows relaying from localhost...

see also the /etc/mail/access file which prevent outside users from
using it.
-------------------------------------------------------------------
localhost.localdomain RELAY
localhost RELAY
127.0.0.1 RELAY
10.10.0.1 RELAY

raqueeb hassan
DRC

"J.O. Aho" <(E-Mail Removed)> wrote in message news:<bqf909$22d5jr$(E-Mail Removed)>...
> Mahendra Modi wrote:
> > In my university we have several outstations which are connected to
> > the Internet through different ISPs. One thing is common about all
> > these is that the ISP gives them a private number, something like
> > 10.0.0.1. Now when I try to setup sendmail from these places they are
> > not allowed to send the mail as they do not have valid ip number. So,
> > I tried to relay the mail through the server at the main campus which
> > has a valid IP number, but even than they can not send the mail. If
> > someone can help me I shall be very grateful. I have read the sendmail
> > howto and have added the ip number of the clients as well as their
> > domain names in the access file with little result. I am running RH linux 9.0
>
> Do they get a deny from the SMTP or do they get a message tehy can't connect?

They get the message relaying denied, though their ip number and
domain name is entered in the /etc/mail/access file

Mahendra

"Mahendra Modi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> In my university we have several outstations which are connected to
> the Internet through different ISPs. One thing is common about all
> these is that the ISP gives them a private number, something like
> 10.0.0.1.


You will have to explain how they connect through to the university.

Do the ISP's have a special link to the uni ?
Do you use a vpn tunnel ?


Which mail servers are you using as the relay ?

The ISP's mail server may be refusing to relay the 10.*.*.* address ?

If you modify /etc/mail/relay, you need to go to /etc/mail and do 'make' to
update the database version of the file.





>Now when I try to setup sendmail from these places they are
> not allowed to send the mail as they do not have valid ip number. So,
> I tried to relay the mail through the server at the main campus which
> has a valid IP number, but even than they can not send the mail. If
> someone can help me I shall be very grateful. I have read the sendmail
> howto and have added the ip number of the clients as well as their
> domain names in the access file with little result. I am running RH linux
9.0
>
> Mahendra

Mahendra Modi wrote:

> They get the message relaying denied, though their ip number and
> domain name is entered in the /etc/mail/access file

Default answer: please see:

http://www.sendmail.org/~ca/email/relayingdenied.html

If that doesn't solve your problems, post one or two related logfile
entries, tell us which of those hosts (to=, relay=) in the entries are
"yours" (or "trusted"), and list the anti-relay FEATUREs you use.

--
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