I am writing an SMTP client using only the IO::Socket package. I am able to successfully communicate with the server and write to and read from the socket. But at one specific point the socket is being closed and if I don't check to see if the socket is opened I produce the "Broken socket" error. Here is the communication lines between me and the server. 
***********************************
Command: EHLO mail.XXXXXXX.com
Line (0): 250-167211-www1.XXXXXXX.com
Line (1): 250-AUTH=LOGIN CRAM-MD5 PLAIN
Line (2): 250-AUTH LOGIN CRAM-MD5 PLAIN
Line (3): 250-STARTTLS
Line (4): 250-PIPELINING
Line (5): 250 8BITMIME
Command: AUTH LOGIN
Line (0): 334 VXNlc44kDJK4kl
Command: bm9yZXBs3920KDSldzLmNvbQ==
Line (0): 334 UGF3kl324Q6
Command: MX443kDKSDldZ5
Software error: 'Broken pipe' at.....
***********************************

[download]
Right after I write the password to the socket, it gets closed somehow. Any help would be greatly appreciated.

In reply to IO::Socket Broken Pipe by complexodus

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.