Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Interesting. There was a project nearly identical to this on one of the freelance boards I use to pick up jobs. I didn't bid on it because the poster specifically stated that automated routines would not be allowed - each record had to be checked manually.

I would probably use IO::Socket::Telnet. Something along the lines of this completely untested code:

use IO::Socket::Telnet; my $socket = IO::Socket::Telnet->new( PeerAddr => '', PeerPort => 25, Timeout => 3 ); die "Not an email server\n" if ! $socket; $socket->send("helo"); my $resp; $socket->recv(my $resp, 4096) or die $!; die "Not an email server\n" if ! defined $resp || ($resp !~ /^220 / && + $resp !~ /^250 /);
this link may be of use in determining other SMTP response codes that indicate it is in fact an SMTP server but not necessarily behaving as you might expect.

Cheers - L~R

In reply to Re^3: Determine if domain is actually used for email by Limbic~Region
in thread Determine if domain is actually used for email by vit

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and the shadows deepen...

    How do I use this? | Other CB clients
    Other Users?
    Others having an uproarious good time at the Monastery: (3)
    As of 2018-04-27 02:03 GMT
    Find Nodes?
      Voting Booth?