Email address verification script

Hi Group,

Please forgive in case this is discussed.

I need help regarding a simple script to verify if the give address exist in the Ldap directory. If the email exists the script should exit with a 0 status or else a non zero status.

I am currently using the following script (and it is working ).
-----
# cat email_rcpt.sh

#!/bin/bash
# Email verification
sleep 1
LDAP_LOOKUP="/var/qmail/bin/qmail-ldaplookup -m"
EMAIL=$1
export $LDAP_LOOKUP $EMAIL
$LDAP_LOOKUP $EMAIL
---------------------------------
# ./email_rcpt.sh foo@bar.com
# echo $?
# 0
----

This script is working correctly. Except that I have a few domains which have catchall addresses & a few whoes email addresses are not maintained in our LDAP ( external domains). I have a file called /var/qmail/control/goodmailaddr which has list of all such domains whoes email address verifications is skipped .

I need to some how modify the above script to recognise this file . My current work-around for this problem is by adding an catchall entry of all the external domains in my LDAP.

Here is how I need to do this .
when the email address is supplied as argument split the domain part and check if it is present in the goodmailaddr file. If present exit with 0 , if not continue with the lookup.

Thanx in advance for help

Regards
Ram

eg : abc@yahoo.com is the email address.

t=`echo $1|cut -d "@" -f2`
k=`grep "$t" <goodmailaddr file>`
if [ $? -eq 1 ]; then
do lookup
else
echo "this is a external address"
exit 0
fi

grep -q "${EMAIL#*@}" /var/qmail/control/goodmailaddr \
&& exit 0

Regards
Dimitre

P.S. If the -q option is not available for your grep version, use this:

grep "${EMAIL#*@}" /var/qmail/control/goodmailaddr > /dev/null 2>&1 \
&& exit 0

Thanx both of you

I will try it out.

Thanx once again

Regards
Ram

Ok guys it worked like magic

Here is the final thing. The "sleep 1" is for reducing the no of concurrent lookups on the LDAP server.

-----
#!/bin/bash
sleep 1
LDAP_LOOKUP='/var/qmail/bin/qmail-ldaplookup -m '
GOODMAILADDR='/var/qmail-outside/control/goodmailaddr'
export $LDAP_LOOKUP $GOODMAILADDR
t=`echo $1|cut -d "@" -f2`
k=`grep "^@$t$" $GOODMAILADDR`
if [ $? -eq 1 ]; then
$LDAP_LOOKUP $1
else
echo "this is a external address"
exit 0
fi
-----

Warm Regards
Ram