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Where is IPv6 in Email

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04 Jan 2021

The space of the IPV4 addressesis running out. This is due to the increase in the number of internet users. The IPV4 address will be exhausted soon. So we have to look for other options to survive on the internet. IPV6 is the best option we can adopt to secure ourselves, so we have to migrate to it. Many people want to know about IPV6. Let's discuss it.

Importance of IPv6

IP addresses have great importance in sending emails. At the start, when the email providers were struggling to figure out the email problems that are present in the inbox, which includes how to differentiate between the correct emails that you want to have in your inbox and spam emails. The limited IPV4 addresses helped them a lot regarding this issue to have a valid email in the inbox.

But the problem is that due to alot of increase in the number of its users, the IPv4 addresses are running out soon. These addresses are of great importance because they occupy a small space and are relatively static. These addresses give them the power to determine the correct emails and point out the useless spam emails. To resolve this IPv4 address running out of issues, IPv6 is the better option as you can create many more addresses through IPv6 than IPv4. It also providesits public IP address to every device which uses the IPv6 address.

Due to these IP addresses, the providers' reputation could be judged, and they could be caught if they do any incorrect work or spam someone. It's not easy to change the IP address and fool someone nowadays. It is tough to make changes to it. That makes it reliable and provides the security of capturing the wrong users who are abusive.

Don't just use IPv6

If there are many advantages of IPv6, then there are also a few disadvantages to it. The most significant drawback is that all of the anti-abuse techniques we can use in the previous IPv4 address can't be used in IPV6. This is all due to the addressing space because it's too big that it's almost impossible to track the abusers on it.

Let's suppose CBT mass email sender has an allocation of about 10^24. Then you can see how a complicated address it becomes as a whole, and when you have to find it, this will cause big trouble, and you can't locate it precisely. Its bigger size causes a problem in searching for the wrong users who send spam emails. An enormous range of numbers will form if you even use those same techniques as the entire range in the same category. This will be equal to the blocking of the whole range of 255 IPv4 and has less impact than the IPv4. That makes the IPv6 less critical in the eyes of the internet service providers. And they speak less about it.

According to research on the top 10 domains through which we can send emails and receive emails. Only 2 of the domains publish an IPv6 DNS record for email. IPv6 providers were very low in numbers. It gives an impression it's almost zero in numbers. It seems providers feel hesitant to speak about IPv6.

The migration path typically used makes matters worse to proxy your IPv6 traffic to someone who doesn't use other than IPv4. But even the SMPT traffic is allowed by those addresses, and it will provide a low reputation.

It feels terrible to hear, What's next?

If a person moves to IPv6, then he has to face his reputation issue. The reputation will move away from the IP address, and that's not a small issue. This can bother many peoples. With time Gmail has moved toward this model only to focus on the configuration of the sender. Who has sent the email? This provides some incentive to use the digital signature to the email sender. Like how they support and encourage the ESP community to use TLS to send emails.

The other major inbox providers should modify their reputation system to improve the domain reputation and take it into account. It's not an easy task because many inbox providers are nearly about 1 million in number. These changes are necessary for the reputation system, and the complaint feedback loop needs to be converted to the domain. If you see the current situation, you will see only Gmail and Yahoo are doing this.

When the domain validation that is used by the inbox providers is enough to use, the next step is for all the users who publish the IP address-based deny list to mention a specific date to stop doing that procedure. If it's difficult to separate and discriminate on the base of IP addresses, then during the transition procedure, IPv6 and IPv4 gateways could be used. Many people think that it is worth proceeding, but some people also keep the other opinion on this and think that this will no worth their efforts to move further. But this problem can be solved, and all the people can be brought on the same page by removing all the other choices and give only one pathway to proceed.

IPv6 and email could be a thing in the future?

According to an estimate in 2017, one in nine emails was sent over IPv6. It means the ratio of the IPv6 in emails is about 9 times less than the Ipv4. The reason is simple because the spammers can use multiple addresses through IPv6 in a single device, so it's alot difficult to block the spam emails from your device. We hope that we would resolve this problem shortly and use IPv6 in a better way in our emails.

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