Hi, I tried to set up (infact I am migrating from UNIX to Windows 2000 ) the DNS and Exchange server 5.5 on windows 2000 server. Everything is ok except that when I try to send email locally it bounce back saying undeliverable. I refer to the same server with the following names. server1.abc.in = abc.in Used the unix abc.in.db file to create the dns file. The mail works when I specify the email address as somebody@xxxxxx but returns when the address is somebody@xxxxxxxxxxxxxxx It doesn't work for somebody@xxxxxxxxxxxxxx too where server2 is another email server. Can send and receive mail from all other domains. I have attached the dns file I am using and please let me know where I have made a mistake. Thanks. ChandraKalum -------------------------------------------------------- The contents of the DNS file: -------------------------------------------------------- ; ; Database file abc.in.dns for abc.in zone. ; Zone version: 20010644 ; @ IN SOA server1.abc.in. hostmaster.server1.abc.in. ( 20010644 ; serial number 28800 ; refresh 7200 ; retry 604800 ; expire 86400 ) ; minimum TTL ; ; Zone NS records ; @ NS server1.abc.in. @ NS ns1.xyz.in. ; ; Zone records ; @ CNAME server1.abc.in. a1271e74-55e0-4b3d-810d-f6832756460d._msdcs 600 CNAME server1.abc.in. _kerberos._tcp.default-first-site-name._sites.dc._msdcs 600 SRV 0 100 88 server1.abc.in. _ldap._tcp.default-first-site-name._sites.dc._msdcs 600 SRV 0 100 389 server1.abc.in. _kerberos._tcp.dc._msdcs 600 SRV 0 100 88 server1.abc.in. _ldap._tcp.dc._msdcs 600 SRV 0 100 389 server1.abc.in. _ldap._tcp.083d8c2b-258f-4c6e-a310- cecfce4deff3.domains._msdcs 600 SRV 0 100 389 server1.abc.in. gc._msdcs 600 A p.q.r.s _ldap._tcp.default-first-site-name._sites.gc._msdcs 600 SRV 0 100 3268 server1.abc.in. _ldap._tcp.gc._msdcs 600 SRV 0 100 3268 server1.abc.in. _ldap._tcp.pdc._msdcs 600 SRV 0 100 389 server1.abc.in. _gc._tcp.default-first-site-name._sites 600 SRV 0 100 3268 server1.abc.in. _kerberos._tcp.default-first-site-name._sites 600 SRV 0 100 88 server1.abc.in. _ldap._tcp.default-first-site-name._sites 600 SRV 0 100 389 server1.abc.in. _gc._tcp 600 SRV 0 100 3268 server1.abc.in. _kerberos._tcp 600 SRV 0 100 88 server1.abc.in. _kpasswd._tcp 600 SRV 0 100 464 server1.abc.in. _ldap._tcp 600 SRV 0 100 389 server1.abc.in. _kerberos._udp 600 SRV 0 100 88 server1.abc.in. _kpasswd._udp 600 SRV 0 100 464 server1.abc.in. server2 A p.q.r.s2 MX 20 server2.abc.in. localhost A 127.0.0.1 server1 A p.q.r.s MX 10 server1.abc.in. server3 A p.q.r.s3 www CNAME server3.abc.in.