Create Reverse PTR Record for Email Server
Hello,
I recently set up an email server in my house. When I send out emails it oftentimes gets caught as spam in others mailboxes. Sometimes it doesn't even reach them. Someone told me I need to have my ISP create the reverse ptr record for my mail server. When I spoke with my ISP, they said it was something that I do on my end.
Who is right? And if I need to do it on my end how exactly do I do it?
Thanks All! Happy Labor Day Weekend!
ES
I recently set up an email server in my house. When I send out emails it oftentimes gets caught as spam in others mailboxes. Sometimes it doesn't even reach them. Someone told me I need to have my ISP create the reverse ptr record for my mail server. When I spoke with my ISP, they said it was something that I do on my end.
Who is right? And if I need to do it on my end how exactly do I do it?
Thanks All! Happy Labor Day Weekend!
ES
Paul MacDonald
A PTR record is created in DNS. Who owns your DNS?
You need to create a SFP. please use this site:
http://mxtoolbox.com/
enter your e-mail domain and do a blacklist check.
also to create an SPF record:
http://www.123-reg.co.uk/support/answers/Domains/Domain-Configuration/how-do-i-add-an-spf-record-to-my-domain-name-349/
to create a PTR record:
http://www.ipswitch.com/support/imail/guide/imailgsv8.1/Appendix%20A%20dns4.html
a PTR record is basically name to IP resolution and you need to do it on your public DNS.
I assume that you have access and control to your public DNS zone administration.
all the above records are created there
http://mxtoolbox.com/
enter your e-mail domain and do a blacklist check.
also to create an SPF record:
http://www.123-reg.co.uk/support/answers/Domains/Domain-Configuration/how-do-i-add-an-spf-record-to-my-domain-name-349/
to create a PTR record:
http://www.ipswitch.com/support/imail/guide/imailgsv8.1/Appendix%20A%20dns4.html
a PTR record is basically name to IP resolution and you need to do it on your public DNS.
I assume that you have access and control to your public DNS zone administration.
all the above records are created there
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"PTR has nothing to do with your DNS."
This is wrong, wrong, wrong. Sorry ACE.
This is wrong, wrong, wrong. Sorry ACE.
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Although I agree that a PTR is related to your DNS (it is a DNS record after all), very rarely is it ever created in the same place that your other DNS records (all your A records, MX, etc.) are created (I think this is what Sembee2 meant since I have no doubt he knows all the details surrounding PTR records). It is almost exclusively created by the ISP who leases your IP to you, and there is usually no facility for you as the customer to create or manage your own PTR records. You just have to call them up or email them and tell them what PTR record you need created for your IP.
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"It's true that to have a PTR record you must have a static IP address...."
This isn't true, either.
Again, who owns your DNS? You, or your ISP?
This isn't true, either.
Again, who owns your DNS? You, or your ISP?
@paulmacd you are wrong on so many levels.
If you have a dynamic DNS entry, how is the PTR going to stay active because your address changes frequently?
PTR has nothing to do with YOUR DNS - read what I wrote.
The PTR has to be set on the IP address, which is unconnected to your own DNS entries.
Two different zone records, controlled by two different groups. It might be that your ISP also looks after your domain name, but that doesn't mean they will set the PTR for you.
I could set my PTR to maila.microsoft.com if I wanted to, nothing Microsoft could do about it.
Simon.
If you have a dynamic DNS entry, how is the PTR going to stay active because your address changes frequently?
PTR has nothing to do with YOUR DNS - read what I wrote.
The PTR has to be set on the IP address, which is unconnected to your own DNS entries.
Two different zone records, controlled by two different groups. It might be that your ISP also looks after your domain name, but that doesn't mean they will set the PTR for you.
I could set my PTR to maila.microsoft.com if I wanted to, nothing Microsoft could do about it.
Simon.
In a Windows network DHCP updates DNS, if the clients can't update it themselves. It's true PTR records exist in the reverse lookup zone, but there's a one-to-one correlation to A records in the forward lookup zone, and they both exist in (my) DNS.
It's true anyone can add records (or whole domains for that matter) to DNS, regardless of whether or not they're legitimate. It won't matter in most cases because - in your example - it's unlikely anyone outside of yourself is using your DNS to look up Microsoft hosts.
It's true anyone can add records (or whole domains for that matter) to DNS, regardless of whether or not they're legitimate. It won't matter in most cases because - in your example - it's unlikely anyone outside of yourself is using your DNS to look up Microsoft hosts.
PTR records on the public internet can only be updated by the owner of the IP addresses. If you ISP routes a block of IP addresses to you, then you would be considered the owner, even though you are really "Leasing" the addresses.
Basically, If you control the issuing of the IP address, then you would have the authority to managed the reverse lookup zone or PTR records.
If your ISP issues the address to you, then only they can change the reverse zone records. It is a matter of authority.
Basically, If you control the issuing of the IP address, then you would have the authority to managed the reverse lookup zone or PTR records.
If your ISP issues the address to you, then only they can change the reverse zone records. It is a matter of authority.
"PTR records on the public internet can only be updated by the owner of the IP addresses."
Thus the very first question: Who owns your DNS?
Thus the very first question: Who owns your DNS?
ASKER
My DNS is owned/hosted by my ISP.
It's moot now, as you've indicated the problem is solved, but I presume you contacted them again and got things straight?
ASKER
Yes, it is all good. Thank you everyone for your input! I greatly appreciate it!!
Enjoy the weekend.
Enjoy the weekend.