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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To expand on that. In DNS you have to have an A record for “mail.example.com” that tells it what IP to use for that FQDN hostname. You ALSO have to have
an MX record that tells it your main mail server record is mail.exmaple.com.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For a BIND 9.x zone file for domain, example.com the records would look something like:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">; Mail Servers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> IN MX 10 mail.example.com ; Main Mail Exchange record<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">; A records<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">mail IN A x.x.x.x ; IP for main mail server<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In the above the x.x.x.x should be whatever your IP is. The semicolons and what follows them are comments and can be left out but if includes must have the
semicolon.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The 10 after the MX is a priority. If you have multiple mail servers you can give them different priorities with the lower numbers being the most preferred
so people sending you use the preferred one if available.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Also notice that in the A record it has “mail” and NOT “mail.example.com”. This is because the zone is example.com and will automatically append example.com
to anything in the left column so long as it isn’t terminated with a dot. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Jeffrey C. Lightner</span></i><i><span style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Sr. UNIX Administrator</span></i><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">DS Waters of America, Inc.</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">5660 New Northside Drive NW</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Suite
<i>250 (adjust as needed)</i></span><span style="font-size:11.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Atlanta, GA 30328</span><span lang="PT" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P:
<i>678-486-3516<o:p></o:p></i></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">C:
<i>678-772-0018</i></span><span lang="PT" style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">F:
<i>678-460-3603</i></span><span lang="PT" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">E:
<i>jlightner@water.com</i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> ale-bounces@ale.org [mailto:ale-bounces@ale.org]
<b>On Behalf Of </b>Jim Kinney<br>
<b>Sent:</b> Tuesday, December 17, 2013 11:20 AM<br>
<b>To:</b> Atlanta Linux Enthusiasts<br>
<b>Subject:</b> Re: [ale] First time setting up mail server (postfix & dovecat)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">In order to recieve email, the interwebs must be able to find your system. That is done by the host and domain name. You will need to be using real ones so postfix will understand what domains it's really supposed
to accept mail for.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have the domain <a href="http://jimkinney.us">
jimkinney.us</a>. So I put that into my mailserver so it knows where it is. I have my DNS records set to send mail to my server (<a href="http://barkingcat.jimkinney.us">barkingcat.jimkinney.us</a>). So the mailserver knows it's name is barkingcat on the domain
<a href="http://jimkinney.us">jimkinney.us</a>. Now when mail is _sent_ it shows in the headers to have been sent from
<a href="mailto:me@jimkinney.us">me@jimkinney.us</a> and it originated from <a href="http://backingcat.jimkinney.us">
backingcat.jimkinney.us</a>.<o:p></o:p></p>
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<p class="MsoNormal">So you will need to put in your FQDN (mine is <a href="http://barkingcat.jimkinney.us">
barkingcat.jimkinney.us</a>) for the hostname and the full domain name (mine is <a href="http://jimkinney.us">
jimkinney.us</a>).<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Dec 17, 2013 at 11:02 AM, Adrya Stembridge <<a href="mailto:adrya.stembridge@gmail.com" target="_blank">adrya.stembridge@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">I'm attempting to set up my trac installation to accept replies via email. This is the first time configuring a machine to receive mail, and I have a noobish question. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In postfix/main.conf I am asked to provide "myhostname", which the examples show as '<a href="http://mail.example.com" target="_blank">mail.example.com</a>'. The next config item is "mydomain", which the examples show as '<a href="http://example.com" target="_blank">example.com</a>'. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I don't expect much inbound mail traffic. Is it necessary to have a subdomain for mail to be received? If not, is there any gotchas with having identical values for "myhostname" and "mydomain"?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">PS: I'm actually able to establish a connection to my server both locally and remote using "telnet
<a href="http://example.com" target="_blank">example.com</a> 143" even though my "myhostname" value is '<a href="http://mail.example.com" target="_blank">mail.example.com</a>'. The connection fails with "telnet
<a href="http://mail.example.com" target="_blank">mail.example.com</a> 143" since that subdomain is not configured in DNS. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>
Ale mailing list<br>
<a href="mailto:Ale@ale.org">Ale@ale.org</a><br>
<a href="http://mail.ale.org/mailman/listinfo/ale" target="_blank">http://mail.ale.org/mailman/listinfo/ale</a><br>
See JOBS, ANNOUNCE and SCHOOLS lists at<br>
<a href="http://mail.ale.org/mailman/listinfo" target="_blank">http://mail.ale.org/mailman/listinfo</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <o:p></o:p></p>
<div>
<p class="MsoNormal">-- <br>
James P. Kinney III<br>
<i><br>
</i>Every time you stop a school, you will have to build a jail. What you gain at one end you lose at the other. It's like feeding a dog on his own tail. It won't fatten the dog.<br>
- Speech 11/23/1900 Mark Twain<br>
<i><br>
</i><a href="http://heretothereideas.blogspot.com/" target="_blank"><i>http://heretothereideas.blogspot.com/</i></a><o:p></o:p></p>
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<p class="f758a8b8-08bf-4bab-8d22-45dba9e71175"><font face="Arial"><font color="fuchsia"><font style="FONT-FAMILY: Arial; FONT-SIZE: 10pt" size="2"></font></font></font> </p>
<p class="f758a8b8-08bf-4bab-8d22-45dba9e71175"> </p>
<p class="f758a8b8-08bf-4bab-8d22-45dba9e71175"><font face="Arial"><font color="fuchsia"><font style="FONT-FAMILY: Arial; FONT-SIZE: 10pt" size="2">Athena<font size="1">®</font>, Created for the Cause</font><font size="1">™
</font></font></font></p>
<p class="f758a8b8-08bf-4bab-8d22-45dba9e71175"><font size="2" face="Arial">Making a Difference in the Fight Against Breast Cancer</font></p>
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<p class="f758a8b8-08bf-4bab-8d22-45dba9e71175"><font face="Arial"><font size="2"><strong>How and Why I Should Support Bottled Water!<br>
</strong>Do not relinquish your right to choose bottled water as a healthy alternative to beverages that contain sugar, calories, etc. Your support of bottled water will make a difference! Your signatures count! Go to
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