debian man page for dns_mx

dns_mx(3)						     Library Functions Manual							 dns_mx(3)

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 -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)