DNS

[BCC1Tech]

I recently pointed our email to our office, but I am having an issue I'm not sure how to resolve. Our web site is still hosted elsewhere, but now the email comes to our office. I contacted our isp - Qwest and had them set up reverse DNS for us, but it didn't seem to make a difference.

We are not able to receive mail from Comcast. Below is what the Comcast technician told me. Can someone tell me what I need to do to fix this?

Thank you!
Melinda

FAIL Reverse DNS entries for MX records ERROR: None of your mail server(s) seem to have reverse DNS (PTR) entries (I didn't get any responses for them). RFC1912 2.1 says you should have a reverse DNS for all your mail servers. It is strongly urged that you have them, as many mailservers will not accept mail from mailservers with no reverse DNS entry. You can double-check using the 'Reverse DNS Lookup' tool at the DNSstuff site (it contacts your servers in real time; the reverse DNS lookups in the DNS report use our local caching DNS server).
Mail FAIL Connect to mail servers ERROR: I could not complete a connection to any of your mailservers!

Could not connect without glue or A record.<br />
If this is a timeout problem, note that the DNSreport only waits about 40 seconds for responses, so your mail *may* work fine in this case but you will need to use testing tools specifically designed for such situations to be certain.

 

[BCC1Tech]

Help! We are still not receiving any email. I haven't received a message since this morning and I'm not sure what is wrong. Any help would be hugely appreciated!

 

[elgrandeperro]

You need are still advertising mail as your mail relay, 216.81.70.128. This is wrong. Don't you want 71.216.93.193 ?

That is the one responding on port 25.
Do it this way so you can keep the old mail entry:

bouldercounty.com. IN MX 10 newmail.bouldercounty.com.
newmail.bouldercounty.com. IN A 71.216.93.193

 

[BCC1Tech]

Everything looked right in the control panel for 71.216.93.193, but it kept coming up with the old ip. I've added the newmail and I do see that coming up. Do I leave the old entry or delete?

Sorry for being such a pain. I appreicate all of your help!

 

[elgrandeperro]

The beauty of MTAs is that they try all servers if they can't connect, from low MX (higher priority) to high MX. So keeping "mail" as a MX record does not hurt but you don't need it.
I would leave the A record and remove the MX record.