Re: [courier-users] maildrop variable for virtual user recipient

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Fred Ho writes:

> Hi all,
> I am running Courier 0.52.1 and Courier-Authlib 0.58 on Redhat RHEL4.
>
> The user authentication is through the userdb for all virtual users.
> The home directories for all the users are under the directory
> /home/mailusers/fredhonet/<userid@fredho.net>. The directories are
> owned by user "mailusers".
>
> I created the /etc/courier/maildroprc for handling of vacation
> autoresponds by using the Courier's mailbot command as follows:
>
> MAILHOME=$HOME
> `test -f "$MAILHOME/away.msg"`
> if ( $RETURNCODE==0 )
> {
> # Send Out-of-office notice auto-respond
> exception {
> cc "| /usr/lib/courier/bin/mailbot -d \"$MAILHOME/away\" -D 1 -t
> "$MAILHOME/away.msg\" -s 'Subject: Out of Office Notice' -A $LOGNAME
> /usr/sbin/sendmail -t -f ''"
> }
> }
>
> The autoresponds mail works but the sender is "mailusers@fredho.net",
> not the virtual user "fkho@fredho.net" as expected. Apparently,
> the variable LOGNAME does not evaulated to the virtual userid in
> maildrop.

No, it's not.

> So, how do I get the actual user-id to pass to mailbot from inside
> the maildrop script?

Use the import statement to import the environment variables described in
the dot-courier man page.

You will also need pass the -f option to mailbot, because it's mailbot that
generates the mail headers. The -f option to sendmail only sets the
envelope return address.

Also, if you are using any kind of a "catchall" setup of any kind, forget
the whole thing unless you have knowledge and experience in system security;
because unless you understand VERY well how maildrop and shell expansion
works, you're going to be running an exploitable script with gaping security
holes.



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