I'm not quite sure I understand where you're getting stuck, but it sounds like you have already done the CSV parsing bit - you're able to break each line into a series of fields. You also sounds like you know how to go about munging out the data you want from each field. So my best guess is that where you are stuck is with how to get data into and out of perl data structures.

The @data that you get from Text::CSV::Simple is an array of array references. That means that each item in the array is itself a reference to an array composed of three fields. That means you need to derefernce it to get at the fields like this: 

for my $row(@data){
    my($smtp,$user,$server) = @$row;
    # munge $stmp
    next unless $smtp;
    # munge $user and $server
    # recombine them into a string
    # write the string to a file
}

[download]
If I've misunderstood the part you're having a problem with, let me know.

In reply to Re: Best method of munging CSV data - using Text::CSV::Simple? by jZed
in thread Best method of munging CSV data - using Text::CSV::Simple? by billie_t

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.