Why is rDNS needed?
This will help deliver your messages to your target audience's inboxes. It is on par with the presence of SPF and DKIM.
Without this, you are very much at risk of the delivery of your email. You also put your IP at risk of being blacklisted.
rDNS is a way of verifying that your emails are indeed from you.
This is similar to how you can do a DNS lookup to find the DNS information of a website or IP address. Only the opposite is true.
When your email is received, this server will (for sure) run an rDNS check to make sure you are who you are in your email.
It compares the IP address you are sending the email from, as well as the domain and email address you are sending the email from, to make sure they are indeed assigned to each other.
If he finds that the IP address is buy bulk sms service not associated with the domain of the sending email address, there is a good chance that he will not accept it.
And the intended recipient will never see it, because the server says, "No, it doesn't work, probably a scammer, and you don't get a response."
If your email is allowed, it's probably a coincidence or gives you the opportunity to doubt, for now.
If you continue to send without proper rDNS settings, then your emails will likely start blocking soon.
New management features of Mivocloud rDNS
If you are a Mivocloud customer, you have easy access to your rDNS information and you can change it at any time without using support tickets or anything else.
All you have to do is:
2) Click Reverse DNS and specify the domain opposite your IPv4 and/or IPv6
3) Click Update
For clients my.mivocloud.com:
1) In Instances click on the name of instance.