Morning all, good to see you.
I have some nasty code here which I wrote a while back to do MX record lookups. It actually works, but I was just looking at it, and realised it was a bit nasty: there must be a better way. I am still really bad at regular expressions... Here is some code 
use Net::DNS::Resolver;
use Net::DNS::RR;
use Net::DNS::Packet;
use strict;

#Takes an email address and returns the 
#mx record (uri of the smtp server that looks after this domain) as a 
+string
sub mxLookup(){

   #extract the domain from the email address
   my ($email) = @_;
   my @parts = split(/\@/, $email);
   my $domain = @parts[1];

   #Create a DNS Resolver and request records of type MX
   my $server;
   my $res = new Net::DNS::Resolver;
   $res->nameservers("202.27.184.3", "202.27.184.5", "203.96.152.4", "
+203.96.152.12");
   my $packet = $res->send($domain, "MX") || return "error";

   #Parse the results to get the preferred smtp server for this domain
   my $answer = $packet->string;
   my $answerSection = ";; ANSWER SECTION";
   my @results;
   @results=split(/$answerSection/, $answer); 
   @results=split(/;;/, $results[1]);
   @results=split(/\)\n/, $results[0]);
   @results=split(/\n/, $results[1]);
   my $priority = "99999999999";

   foreach(@results){
      my @results2=split(/\t/, $_);
      my @results3=split(/ /, $results2[4]);
      if ($results3[0] < $priority){
         $server = $results3[1];
      }
  }
  if (!$server){
      return "error";
  }
  return $server;
}

[download]
Any ideas?
Regards,
Gerard

In reply to MX Record Lookups by Gerard

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