MX Lookup Mail Server Domain by Email Address

How to find the mail server for a given email address. Returns the domain name of the primary mail server.

Download Chilkat Email ActiveX for POP3 / SMTP

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat.MailMan2', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    --  Any string argument automatically begins the 30-day trial.
    DECLARE @success int

    EXEC sp_OAMethod @mailman, 'UnlockComponent', @success OUT, '30-day trial'
    IF @success <> 1
      BEGIN
        PRINT 'Component unlock failed'
        RETURN
      END

    --  Should return "mail.chilkatsoft.com"
    DECLARE @mailServerHostname nvarchar(4000)

    EXEC sp_OAMethod @mailman, 'MxLookup', @mailServerHostname OUT, 'support@chilkatsoft.com'

    PRINT @mailServerHostname
END
GO