anakin30, I would have done something similar to Lady_Aleena's approach, but I would have just stored the count in the hash (see code below). Of course, my approach wouldn't have stored all the email addresses for later use like her code does. 

use strict;

my $file = "email_list.txt";
my %domains;

open(DATA,"<",$file) || die "Unable to open file '$file':  $!\n";

while (<DATA>) {
  my ($user,$domain) = split /\@/;
  $domain =~ s/^\s*//s;  # Stripping out leading white spaces
  $domain =~ s/\s*$//s;  # Stripping out trailing white spaces
  $domains{lc($domain)}++;
}

close(DATA);

foreach my $domain (sort keys %domains) {
  print "$domains{$domain} $domain\n";
}

[download]

Just another example of TIMTOWTDI.

UPDATE - Made a minor spelling correction.

In reply to Re^2: How to do script to separate name and email domain ? by dasgar
in thread How to do script to separate name and email domain ? by anakin30

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.