If you mean the Message-Id header, you should be able to retrieve it like any other header. I use MAIL::IMAPClient in one of my scripts. Here's an example, taken from my code: 
# ($imap is a MAIL::IMAPClient object already connected to the server)

$imap->Uid(0);
$imap->select('INBOX');
$totalMessages = $imap->message_count();
for my $messageSequenceNumber (1 .. $totalMessages)
{
    my @headerList = ('Message-ID', 'From', 'Subject', 'To', 'Date');
    my $headers = $imap->parse_headers($readMessage, @headerList);
    print "Message-Id is --> $$headers{'Message-ID'}[0])";
}

[download]
However, if you're already using other modules I'm sure you can get the value using them. Search the docs to see how to retrieve a specific header's value.

In reply to Re: How do i get the messagID - IMAP by blahblahblah
in thread How do i get the messagID - IMAP by camo

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.