NAME

       dns_mx - look up Mail eXchanger

SYNTAX

       #include <dns.h>

       int dns_mx(stralloc* out,stralloc* fqdn);

DESCRIPTION

       dns_mx  looks  up  MX  records for the fully-qualified domain name in fqdn. It puts the MX
       records into out and returns 0. Each MX record is a  two-byte  MX  distance  (big  endian)
       followed  by a \0-terminated dot-encoded domain name. If the domain does not exist in DNS,
       or has no MX records, out will be empty.

       If dns_mx has trouble with the DNS lookup or runs out of memory, it  returns  -1,  setting
       errno appropriately. It may or may not change out.

SEE ALSO

       dns_mx_packet(3), dns_ip4(3), dns_ip6(3)

                                                                                        dns_mx(3)