Team, i would like to valide the e-mail addess (external) whether it is valid or not. is there any best online websites available? or any free tools ? How can we vaildate the external e-mail address? . Please help

go to http://centralops.net/ and use Email Dossier tool. Or simply you can send a test message to those recipient, if you are not getting a NDR then the address may valid.

Hi, http://www.coveryourasp.com/ValidateEmail.asp Thanks, Richard Your expertise never fails to impress :)

Download SMTP Diag tool from the following Microsoft Website http://www.microsoft.com/downloads/details.aspx?familyid=bc1881c7-925d-4a29-bd42-71e8563c80a9&displaylang=en Then execute the following command from command prompt smtpdiag "source address" "destination address" -d <publicdnsip> /v smtpdiag "support@abc.com" "aldtravel@airtel.net.om" -d 50.72.1.186 /v Result (See the BOLD fonts) ************************ Searching for Exchange external DNS settings.Computer name is TPEXCHANGE.VSI 1 has the following external DNS servers:There are no external DNS servers configured. Checking SOA for airtel.net.om.Checking external DNS servers.Checking internal DNS servers. Checking TCP/UDP SOA serial number using DNS server [192.168.1.200].TCP test succeeded.UDP test succeeded.Serial number: 2009111005 Checking TCP/UDP SOA serial number using DNS server [50.72.1.186].TCP test succeeded.UDP test succeeded.Serial number: 2009111005SOA serial number match: Passed. Checking local domain records.Starting TCP and UDP DNS queries for the local domain. This test will try tovalidate that DNS is set up correctly for inbound mail. This test can fail for3 reasons. 1) Local domain is not set up in DNS. Inbound mail cannot be routed tolocal mailboxes. 2) Firewall blocks TCP/UDP DNS queries. This will not affect inbound mail,but will affect outbound mail. 3) Internal DNS is unaware of external DNS settings. This is a validconfiguration for certain topologies.Checking MX records using TCP: abc.com. MX: mx01.abc.com (10)Checking MX records using UDP: abc.com. MX: mx01.abc.com (10)Both TCP and UDP queries succeeded. Local DNS test passed. Checking remote domain records.Starting TCP and UDP DNS queries for the remote domain. This test will try tovalidate that DNS is set up correctly for outbound mail. This test can fail for3 reasons. 1) Firewall blocks TCP/UDP queries which will block outbound mail. Windows2000/NT Server requires TCP DNS queries. Windows Server 2003 will use UDPqueries first, then fall back to TCP queries. 2) Internal DNS does not know how to query external domains. You musteither use an external DNS server or configure DNS server to query externaldomains. 3) Remote domain does not exist. Failure is expected.Checking MX records using TCP: airtel.net.om. MX: cluster1.airtel.messagelabs.com (10) MX: cluster1a.airtel.messagelabs.com (20)Checking MX records using UDP: airtel.net.om. MX: cluster1a.airtel.messagelabs.com (20) MX: cluster1.airtel.messagelabs.com (10)Both TCP and UDP queries succeeded. Remote DNS test passed. A: cluster1.airtel.messagelabs.com [112.78.5.23] A: cluster1a.airtel.messagelabs.com [112.78.5.23] Checking MX servers listed for aldtravel@airtel.net.om.Connecting to cluster1.airtel.messagelabs.com [112.78.5.23] on port 25.Received: 220 server-11.tower-173.messagelabs.com ESMTP Sent: ehlo abc.com Received: 250-server-11.tower-173.messagelabs.com250-PIPELINING250 8BITMIME Sent: mail from: <support@abc.com> Received: 250 OK Sent: rcpt to: <aldtravel@airtel.net.om> Received: 550 Invalid recipient <aldtravel@airtel.net.om> (#5.1.1) Error: Expected "250". Server rejected the recipient address.Failed to submit mail to cluster1.airtel.messagelabs.com.Connecting to cluster1a.airtel.messagelabs.com [112.78.5.23] on port 25.Received: 220 server-12.tower-173.messagelabs.com ESMTP Sent: ehlo abc.com Received: 250-server-12.tower-173.messagelabs.com250-PIPELINING250 8BITMIME Sent: mail from: <support@abc.com> Received: 250 OK Sent: rcpt to: <aldtravel@airtel.net.om> Received: 550 Invalid recipient <aldtravel@airtel.net.om> (#5.1.1) Error: Expected "250". Server rejected the recipient address.Failed to submit mail to cluster1a.airtel.messagelabs.com. I hope this will help you out.

Another one... http://verify-email.org/ Santhosh Sivarajan | MCTS, MCSE (W2K3/W2K/NT4), MCSA (W2K3/W2K/MSG), CCNA, Network+ Houston, TX http://blogs.sivarajan.com/ http://publications.sivarajan.com/ This posting is provided "AS IS" with no warranties, and confers no rights.