topic Re: Unix expression question in Operating System - HP-UX

Unix expression question

Kathleen — Fri, 04 Apr 2003 14:48:16 GMT

I want to block certain email addresses in the sendmail access file.

The address I want to block is
offer12345@excite.com

The 12345 changes so I would like to enter the email address in that file in the format of block everything that starts with offer, has any number in the middle, and ends with @excite.com
I am not sure the format to enter that in. Can anyone help?
Thanks in advance.

Re: Unix expression question

steven Burgess_2 — Fri, 04 Apr 2003 15:38:50 GMT

Hi Kathleen

I'm not sure it's as simple as using an expression to allow the shell to match all patterns

ie

'[0-9a-b]?@excite.com'

Have a look through this document.

http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000064128788

HTH

Steve

Re: Unix expression question

Geoff Wild — Fri, 04 Apr 2003 16:45:34 GMT

Here's a better way, add the following to sendmail.cf:

SIsexcite$
R$* excite.com $*^I$@ OK$
R$* ^I$#error $: "550 Access Denied. Forgeries are disallowed."$
$
SLocal_check_mail$
R$* excite.com $*^I$: $>Isexcite $&{client_name}$

NOTE: the ^I is a tab, $ is return

What this does is prevent someone from using a excite.com address and sending email from their server - it only allows email from excite's server....you can do this for hotmail,,,etc.

Rgds...Geoff

Re: Unix expression question

Geoff Wild — Fri, 04 Apr 2003 17:51:36 GMT

except that some of the $ are $!

Only the $ at the end of the line is a return - sorry about that.