<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">My best guess is because you're forging your envelope sender and <i>From:</i> header.</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default"><font face="georgia, serif">When your <a href="http://wildblue.net/exede.net">wildblue.net/exede.net</a> MTA tries to connect to <a href="http://aol.com">aol.com</a>'s MX,</font><span style="font-family:georgia,serif"> the email isn't really coming from a <a href="http://princeton.edu">princeton.edu</a> domain. Neither </span><span style="font-family:georgia,serif"><a href="http://princeton.edu">princeton.edu</a> nor alumni.</span><span style="font-family:georgia,serif"><a href="http://princeton.edu">princeton.edu</a> permit you to do that</span><font face="georgia, serif">—according to their SPF records</font><span style="font-family:georgia,serif">.</span></div><div class="gmail_default"><span style="font-family:georgia,serif"><br></span></div><div class="gmail_default"><span style="font-family:georgia,serif">The SPF authentication failure won't necessarily cause your email to be rejected every time, but it will reduce the likelihood of it being accepted. "</span><font face="georgia, serif">exceeded max retries</font><span style="font-family:georgia,serif">" sounds like <a href="http://aol.com">aol.com</a> is graylisting the message, but never deciding it's hammy enough to deliver.</span></div><div class="gmail_default"><font face="georgia, serif"><br></font></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div style="font-size:12.8px"><div dir="ltr"><div style="color:rgb(102,102,102);font-family:georgia,serif;font-size:x-small"><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"><div dir="ltr"><div style="color:rgb(102,102,102);font-family:georgia,serif;font-size:x-small"> <br>// <a href="http://twitter.com/RiCHi" style="color:rgb(17,85,204)" target="_blank">@RiCHi</a><span style="color:rgb(0,0,0)"> |</span> <a href="tel:%2B44.7789.200701" value="+447789200701" style="color:rgb(17,85,204)" target="_blank">+44.7789.200701</a> | <a href="tel:1.408.256.0084" value="+14082560084" style="color:rgb(17,85,204)" target="_blank">1.408.256.0084</a> </div><div style="color:rgb(102,102,102);font-family:georgia,serif;font-size:x-small">// Other contact details: <a href="http://richi.uk/contact" style="color:rgb(17,85,204)" target="_blank">www.richi.uk/contact</a><span style="font-family:arial,sans-serif;font-size:12.8px;color:rgb(34,34,34)"> </span></div></div></div><div dir="ltr" style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"> </div><div dir="ltr" style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"> </div></div></div></div></div></div></div></div></div><br></div></div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Nov 3, 2018 at 12:06 PM Dennisf63 <<a href="mailto:fowler63@alumni.princeton.edu">fowler63@alumni.princeton.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>For some time now I've been getting Mail Delivery Failure
messages seen below. <br>
</p>
<p>This is just a single sample. It doesn't happen all the time,
just often enough to be irritating. Often the outgoing messages
are replies from me to them. Only certain recipients seem to be
involved, but more than one. Can anyone interpret what these Mail
Delivery Failure Messages are trying to tell me? <br>
</p>
<p>Is the problem me or the recipients? Is it the email system? Is
the intended recipients box full?</p>
<p>Oh, I'm using Mozilla Thunderbird, if that helps. <br>
</p>
<div class="m_3964987435574839770moz-forward-container">Thanks in advance. <br>
<br>
-------- Forwarded Message --------
<table class="m_3964987435574839770moz-email-headers-table" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<th nowrap valign="BASELINE" align="RIGHT">Subject:
</th>
<td>Mail Delivery Failure</td>
</tr>
<tr>
<th nowrap valign="BASELINE" align="RIGHT">Date: </th>
<td>Sat, 03 Nov 2018 06:44:17 -0400</td>
</tr>
<tr>
<th nowrap valign="BASELINE" align="RIGHT">From: </th>
<td>Mail Delivery System <a class="m_3964987435574839770moz-txt-link-rfc2396E" href="mailto:no-reply@directv.net" target="_blank"><no-reply@directv.net></a></td>
</tr>
<tr>
<th nowrap valign="BASELINE" align="RIGHT">To: </th>
<td><a class="m_3964987435574839770moz-txt-link-abbreviated" href="mailto:fowler63@alumni.princeton.edu" target="_blank">fowler63@alumni.princeton.edu</a></td>
</tr>
</tbody>
</table>
<br>
<br>
<pre>This message was created automatically by the mail system (ecelerity).
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
>>> <a class="m_3964987435574839770moz-txt-link-abbreviated" href="mailto:viv8@aol.com" target="_blank">viv8@aol.com</a> (while not connected): 554 5.4.7 [internal] exceeded max retries without delivery
</pre>
</div>
</div>
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</blockquote></div>