Restricting relaying by user...

[DavidAkers]

Is there any way to limit relaying by user?

In other words, I'm trying to grant internet email access to certain individuals, and allowing the rest only to send mail within our domain.

Thanks...
-David Akers

 

[datadan]

If you know the IP address or IP range of the users you want to grant access to you could try the following:

vi /etc/mail/access

##
xx.xx.xx.xx RELAY
yy.yy.yy RELAY
## eof

make

Where xx.xx.xx.xx is a known specific IP address and where
yy.yy.yy is a know specific subnet.

the make command makes the access.db.

Of course this assumes you have the following in your /etc/mail/sendmail.mc file

dnl FEATURE('access_db', 'hash -T<TMPF> /etc/mail/access')dnl
FEATURE(''access_db')

HTH

 

[DavidAkers]

Yeah, I thought about that, but I was hoping to limit it by user, rather than by IP.

Also, stopping relaying this way keeps that IP from using the mail for internal stuff.

-David

 

[maxair]

I have exactly the same problem. And the mail is accessed by one http’s webmail, at the same server as sendmail, the IP restrictions don't apply.

Any ideia ?

Thanks in advance
Max

 

[Stingreen]

David,
Why don't you setup a pop before smtp system? Once the pop3 is triggered by the user you wanted to relay, it will relay.
Shouldn't be that hard to setup I guess.

 

[maxair]

David,

I setup the solution in:

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

and works fine.

Max

 

[DavidAkers]

I swear that I scoured the sendmail site for answers before I posted here. I don't know how you found that, but thanks.

Now, I assume I can write a similar ruleset to limit incoming mail the same way. Is there a guide to writing these rules outside of the short one in the sendmail docs? Is there a man page?

Thanks...
-David