C

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. C

#include <C_CkDns.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkDns dns;
    HCkJsonObject json;
    const char *emailAddr;
    int i;
    int count_i;
    const char *domain;

    success = FALSE;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    dns = CkDns_Create();
    json = CkJsonObject_Create();

    emailAddr = "bob@example.com";

    //  This gets all MX domains for an email address.  (Typically one domain.)
    //  The preferred domain will be at index 0 (see below).
    success = CkDns_Query(dns,"MX",emailAddr,json);
    if (success == FALSE) {
        printf("%s\n",CkDns_lastErrorText(dns));
        CkDns_Dispose(dns);
        CkJsonObject_Dispose(json);
        return;
    }

    i = 0;
    count_i = CkJsonObject_SizeOfArray(json,"answer.mx");
    while (i < count_i) {
        CkJsonObject_putI(json,i);
        domain = CkJsonObject_stringOf(json,"answer.mx[i].domain");
        printf("%s\n",domain);
        i = i + 1;
    }



    CkDns_Dispose(dns);
    CkJsonObject_Dispose(json);

    }