<div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">If you are the authoritative record for the domain you need to specify where that email goes. If you have a DNS provider that you are using to manage that DNS traffic then they likely have some of this automated.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 4, 2019 at 5:39 PM Nathan <<a href="mailto:plugaz@codezilla.xyz">plugaz@codezilla.xyz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
I have multiple domains utilizing one single server for all email. I've <br>
read multiple documents and got everything setup and working, I think, <br>
correctly.<br>
<br>
My postfix handles all the domains correctly.<br>
My dovecot handles all the users correctly.<br>
My roundcube handles the multiple accounts correctly.<br>
<br>
What I'm curious about is my dmarc/dkim setup and my DNS setup.<br>
<br>
My primary domain looks like<br>
<br>
A <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a> xxx.xxx.xxx.xxx<br>
MX <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a> mail handled by <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a><br>
TXT mail._<a href="http://domainkey.domain.com" rel="noreferrer" target="_blank">domainkey.domain.com</a> blahblahblahblah<br>
TXT _<a href="http://dmarc.domain.com" rel="noreferrer" target="_blank">dmarc.domain.com</a> blahblahblahblah<br>
SRV _submission._<a href="http://tcp.domain.com" rel="noreferrer" target="_blank">tcp.domain.com</a> directs to <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a><br>
<br>
Each additional domain is setup identically, with their own dmarc and <br>
dkim, except the mx points back to <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a><br>
so <a href="http://domain.net" rel="noreferrer" target="_blank">domain.net</a> would look like<br>
<br>
A <a href="http://domain.net" rel="noreferrer" target="_blank">domain.net</a> xxx.xxx.xxx.xxx<br>
MX <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a> mail handled by <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a><br>
TXT mail._<a href="http://domainkey.domain.net" rel="noreferrer" target="_blank">domainkey.domain.net</a> diffblahblahblahblah<br>
TXT _<a href="http://dmarc.domain.net" rel="noreferrer" target="_blank">dmarc.domain.net</a> diffblahblahblahblah<br>
SRV _submission._<a href="http://tcp.domain.net" rel="noreferrer" target="_blank">tcp.domain.net</a> directs to <a href="http://domain.net" rel="noreferrer" target="_blank">domain.net</a><br>
<br>
My question is, do I not need to do any of this for the domains that are <br>
not actually handling the email, but only for <a href="http://domain.com" rel="noreferrer" target="_blank">domain.com</a> which actually <br>
accepts and sends email?<br>
<br>
Thanks!<br>
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