Problem with Recursive Queries

[KS Tan]

I have set up some control to restrict recursive queries to my DNS
server and found that somehow it affected the delivery and sending of
emails.

Following are entries that I put in the named.conf file to restrict
recursive queries.

view "internal" {
match-clients { 192.168.100.0/24; };
recursion yes;
};
view "external" {
match-clients { any; };
recursion no;

The error message i got from sending mail is :

bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[203.223.137.123]
Mar  7 18:29:08 abs-mail sendmail[1947]: [ID 801593 mail.notice]
k27AEIak001947: ruleset=check_mail, arg1=<bgifwkul at bgi.com.my>,
relay=[203.223.137.123], reject=451
 4.1.8 Domain of sender address bgifwkul at bgi.com.my does not resolve

Can anyone help to see why this is so.

Rgds/


KS Tan