It's not visible outside of pmdev.

Why not?

You shouldn't have received a "Permission Denied" for linking to that URL directly at least

I got tired of seeing those, though yesterday I had tried and was denied for http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23/everyone-quotes-arguments-the-wrong-way.aspx

so its either view the list and check against my post while composing /during preview , or trial and error for X amount of urls I use, or stop trying to link to stuff

I've seen other sites use a re-director, I believe all 3 forms defeat the purpose of spam links but not spam posts 

 .../external/http://example.com
 .../external?=http%3A%2F%2Fexample.com
 .../external/ht.W28Mw/ZjJ2

[download]

When you visit this external page ( which robots aren't allowed to follow ), you get message of the form

You are leaving perlmonks.com, we don't know where this link goes, if its safe for work, known for malware, visit at your own risk

Check for safety with 

http://www.google.com/safebrowsing/diagnostic?site=http%3A%2F%2Fexampl
+e.com
http://www.google.com/interstitial?url=http%3A%2F%2Fexample.com

[download]

check for ASACP....url=http%3A%2F%2Fexample.com

so if a posting doesn't look particularly spammy, but it links to a non-whitelist-approved website, re-director-ize it?

In reply to Re^7: Post within CGI by Anonymous Monk
in thread Post within CGI by systemz64

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.