Get Removed from Blacklist

Happy Friday All,
I noticed when I run a Blacklist check on my public IP address, that I appear on 1 blacklist
Here are the details:
Error 2
I would like to correct this.  I went to my ISP and they said they need the IP address and hostname to create a reverse DNS entry.  I obviously have the IP address, but I'm not sure what goes in the Hostname field.  What should be in that field?

Thank you in advance!
Who is Participating?
Hypercat (Deb)Connect With a Mentor Commented:
Your issue is that typically an rDNS record has to use the host name of the server(s) you're using to send email. So logically you would need to use the same server names as you have in your public DNS zone for your MX records. But by the same token, your email ISN'T actually coming from your external IP address, so an rDNS record which resolves your external IP address to your email server host name(s) won't work.  I've never faced this issue with my clients, since we typically use an external service to receive email but not to send it. I think you might want to check with your external service to see what they recommend for rDNS.  I would think they would already have their own method of providing this.
AmitConnect With a Mentor IT ArchitectCommented:
You need to create A record, PTR and SPF.
Valentina PerezConnect With a Mentor Exchange ServersCommented:

After you have resolved the records DNS.

You can ask to be whitelisted.

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Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
Go to Here:
Add your IP to request the removal.

And follow the Amit suggestion

PTR is a thing of your public IP and it should resolve to your host
Direct "" => IP
PTR      IP =>

And about the SPF:
go here and fill up the fields with your information
zito2000Author Commented:
Thanks All!
When you say "it should resolve to your host"...Are you referring to my email hostname?  
We are running our own Exchange server, but all mailflow is sent/received from our 3rd party email archiving/spam filter company.  So our current SPF and MX records go to them.

My point is, we don't really have an email hostname that goes directly to our IP address.  Our MX records point to the 3rd party company.
Jose Gabriel Ortega CConnect With a Mentor CEO J0rt3g4 Consulting ServicesCommented:
I'm referring to DNS, if you ping the servername it should answer the IP name.
And vice-versa in the other direction "ip" => "exchange server", this is totally independent of the service you're using to filter.

So if you're using a 3rd party to filter the email the flow is as follows:

Mailserver => Antispam service => internet => destination mailbox   (So in the spf should appear the IP of your server and the service of the antispam).

Sender MAilbox => Internet => AS service => Mailserver.

At the end you have MX records right.... so, the inverse form of your domain should resolve this.
for example:
if your filter is Spamina.
then in the SPF records, yours appears your public ip and the filter service hostnames. (last line of spfwizard).

The issue when you have a filtering service is when they got blacklisted, your domain will lose sending emails because of the reputation of the filtering service.
Hypercat (Deb)Commented:
If your email is being sent through an external spam filtering service then the fact that your external IP address is blacklisted is irrelevant, as long as your public DNS zone has the correct MX and SPF record(s) for your spam filtering service. I wouldn't advise setting up alternate MX and SPF records on your public DNS zone for your own server's public IP, because that would leave you open to receiving a lot of spam and potentially virus loads, if the service is down.
zito2000Author Commented:
That's exactly what I was thinking.  When I send an email out and look at the header, it comes from the 3rd party service and IP.  When I look my domain MX records, it points to them.  As long as the third party email service does not get blacklisted, then I shouldn't have issues with mailflow.

But on the flip side to all of this, I still am not fond of appearing on a blacklist.  Can I correct this by adding a reverse DNS record?  I know I don't NEED to, but when other colleagues see this and there is any sort of issue, they immediately say "it's because we are on a blacklist". I want to fix this so they can stop using this as the scapegoat.
zito2000Author Commented:
Excellent advice, Hypercat.  I will reach out to them and report back my findings.
Valentina PerezExchange ServersCommented:
The issue seems to be solved, no more replies from th author
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