Special characters have to be escaped1 (which is probably the search term you needed) with a backslash, as is done to the "@" in the first line below. (The bars in the second line are merely to make the printout show unambiguously what's in $ascalar. 

$ascalar="myemail\@gmail.com";

print "\$ascalar is |" . $ascalar . "|\n";

[download]

Output of the code above looks like this:

$ascalar is |myemail@gmail.com|

And, at the hastiest of scans of your update, neverminda, same answer. BTW, this is the kind of question that's a good argument for reading the docs.

1 Belated Update: An excellent alternate -- use of appropriate quoting -- is well covered by others and should have been noted sooner, since my initial statement is incorrectly categorical. See the replies from Fletch & shmem below.

In reply to Re: How to put special characters($, @, #) into a field name? by ww
in thread How to put special characters($, @, #) into a field name? by neverminda

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.