<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt">Lew wrote:<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt">> I don’t think it’s a problem with the email address, that comes much later in the process after HELO.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt">> It’s wanting the full hostname (FQDN of the root, ie ns1.mydomain.net) of the box itself to do a PTR lookup etc..<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal">M Aronoff wrote:<span style="font-size:12.0pt"><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt">>If it is not looking at the email address I am confused even more by this setting. So how are clients supposed to configure Outlook to be able to send email? <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
</div>
<div id="signature_old">
<div id="x1539a3ed523d423">
<div id="xedcd1f00142d498fb02d0a5dd88924ea">
<div>
<p class="MsoNormal"><span style="font-size:12.0pt">Not really an issue with email client, it has to do with how email servers negotiate a session between them.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Session (simple version) looks like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 220 smtp.server.com Simple Mail Transfer Service Ready<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: HELO client.example.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 250 Hello client.example.com<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: MAIL FROM:<mail@samlogic.com><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 250 OK<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: RCPT TO:<john@mail.com><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 250 OK<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: DATA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 354 Send message content; end with <CRLF>.<CRLF><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: <The message data (body text, subject, e-mail header, attachments etc) is sent><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 250 OK, message accepted for delivery: queued as 12345<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">C: QUIT<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">S: 221 Bye<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">You’re not getting to MAIL FROM command, the mail server is looking for the valid hostname with FQDN from your server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">telnet to port 25 of your mailserver and see what the 220 returns (that’s how it will answer the connection request). That’s also the name it presents to other mailservers, with BX it’s usually the root name
of the box. If it’s correct you may want to look at DNS issues resolving that name or SPF and/or DMARC issues.<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>