Need to add mail server for Yahoo administered subdomain

mfoley · 04-03-2019, 01:05 AM

I have a domain set up with Yahoo Small Business: mydom.org, with IP 24.25.26.27. The Yahoo Domain Control Panel lets me configure an 'A' record to set up a subdomain, mets.mydom.org, with IP 27.26.25.24, that is, a completely different server. This setup works in that I can get to mydom.org and mets.mydom.org websites on their respective servers.

What I now want to do is have email to thisuser@mets.mydom.org routed to the mets.mydom.org host. Once mail arrives there, I can configure sendmail to accept mail for that domain. Doing a simple 'host' lookup on these domains gives:

Code:

$ host mydom.org
mydom.org has address 24.25.26.27
mydom.org mail is handled by 10 mx-biz.mail.am0.yahoodns.net.

$ host mets.mydom.org
mets.mydom.org has address 27.26.25.24

There is no "mail is handled by" line for host mets. The Yahoo Domain Control Panel lets me configure A, CNAME, TXT, MX and SRV records. I think MX is not what I want as that will refer to the mydom.org host.

How do I set things so my 'host' command results are:

mets.mydom.org mail is handled by 10 27.26.35.24

scasey · 04-03-2019, 01:20 AM

If you want mets.mydom.org to be able to receive email, the subdomain will need an MX record. If you don't see how to do that in the Yahoo Domain Control Panel, I think you need to contact yahoo with this question.

Note: MX records point to FQDNs, not IP addresses, so

Code:

     MX 10 mets.mydom.org

would yield

Code:

$ host mets.mydom.org
mets.mydom.org has address 27.26.25.24
mets.mydom.org mail is handled by mets.mydom.org

Note2: Have you tried it? If there's no MX record, the mail delivery should default to the mets.mydom.org domain.

descendant_command · 04-03-2019, 01:34 AM

If there is no MX record, delivery will be attempted using the A record.
You should be “good to go”.

mfoley · 04-03-2019, 10:11 PM

Quote:

Originally Posted by descendant_command

If there is no MX record, delivery will be attempted using the A record.
You should be “good to go”.

Awesome! That actually worked! I'll also see if I can configure an actual MX record per scasey's suggestion and post back. That might take a day or two.