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<p style="margin-bottom: 0cm; margin-top: 0pt;">e2xbegqsdyt21hfc wrote:<br>
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<blockquote cite="mid:234294.74506.qm@web35808.mail.mud.yahoo.com"
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<pre wrap="">--- On Thu, 4/9/09, Shachar Shemesh wrote:
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<pre wrap="">e2xbegqsdyt21hfc wrote:
Why the use of someone@[an_explicit_ip_address] is
strongly discouraged?
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<pre wrap=""><!---->
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<pre wrap="">a. Where did you get the idea it was strongly discouraged?
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Quoting RFC 822:
Note: THE USE OF DOMAIN-LITERALS IS STRONGLY DISCOURAGED. It
is permitted only as a means of bypassing temporary
system limitations, such as name tables which are not
complete.
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<pre wrap="">b. Why would you WANT to use it?
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I want to test an app by writing a quick/dirty wrapper that sends mail to a single, known, mail server and avoids DNS lookup.
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First of all, it sounds like your app falls into the explicit exception
mentioned in the RFC.<br>
<br>
The reason IP based email is discouraged is because it has zero
resilience to even the slightest change in network configuration.
Ideally, when you send me email, I want you to know (read - depend on)
as little as possible about my email setup.<br>
<br>
Shachar<br>
<br>
<pre class="moz-signature" cols="72">--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
<a class="moz-txt-link-freetext" href="http://www.lingnu.com">http://www.lingnu.com</a>
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