Why is reverse DNS important for email sending?
Summary
What email marketers say10Marketer opinions
Email marketer from WebHostingTalk Forum says reverse DNS is important because it provides a crucial check for email servers to ensure that the incoming mail is indeed from a legitimate source, which helps in filtering out spam.
Email marketer from SMTP2GO shares that reverse DNS validates the association between the sending IP address and domain, preventing spoofing and ensuring mail servers recognize your mail as legitimate.
Email marketer from Reddit explains that having a correctly configured reverse DNS record can significantly improve your email deliverability by confirming the legitimacy of your sending server to receiving mail servers.
Email marketer from Sender.net says that a reverse DNS record links an IP address to a domain name, confirming that the mail server has permission to send email on behalf of that domain, which builds trust with ISPs.
Email marketer from GlockApps shares that reverse DNS is a basic requirement to help confirm your mail server is authentic, which influences deliverability and your sender reputation.
Email marketer from Email Geeks shares it's an A to B to A loop. Domain points to IP (via A record), IP points to domain (via PTR record). If you end up at the same place you started after both lookups, you're good.
Email marketer from Postmark shares that having reverse DNS set up correctly helps prove that your mail server is authorized to send email for your domain, improving trust with recipient servers.
Email marketer from EmailGeeks Forum says rDNS helps by giving mail servers a way to verify that the IP address sending email for a specific domain is actually authorized to do so. This helps to build a trusted relationship with mail providers.
Email marketer from ExpertSender shares that reverse DNS is important because it confirms that the sending IP address is authorized to send emails for the domain, improving deliverability and sender reputation.
Email marketer from Mailjet shares that reverse DNS helps establish credibility with ISPs by confirming the IP address is authorized to send emails for the domain, increasing deliverability.
What the experts say4Expert opinions
Expert from Word to the Wise responds that FCrDNS (Forward Confirmed Reverse DNS) is used by mailbox providers to verify a relationship between the domain and IP address, confirming the IP has permission to send for the domain which helps improve email deliverability.
Expert from Email Geeks shares that reverse DNS lets you take an IP address and map it to a hostname. FCrDNS lets you demonstrate that a hostname and an IP address “match”, which lets you map hostname-based reputation to IP-based reputation. It proves domain and IP owners are cooperating, indicating a legitimate traffic source. Mailbox providers prefer mail from IPs with valid reverse DNS.
Expert from Email Geeks explains that Yahoo and Google require all senders to have valid reverse DNS.
Expert from SpamResource explains that reverse DNS provides a means for recipient mail servers to verify the authenticity of the sending server, improving deliverability rates by confirming the server is legitimate.
What the documentation says5Technical articles
Documentation from Microsoft Learn explains that reverse DNS ensures that the IP address is associated with the sending domain, building trust and improving email delivery rates by verifying the sender's identity.
Documentation from AWS Documentation explains that reverse DNS records are crucial for verifying that the email server is legitimate, preventing it from being flagged as spam and ensuring better delivery rates.
Documentation from RFC Editor states that reverse DNS allows mail servers to verify that the sender's IP address matches the domain from which the email claims to originate, reducing the likelihood of spam.
Documentation from MXToolbox explains rDNS allows mail servers to perform a check on the IP address against the domain it claims to represent. If the rDNS matches, it improves trust and delivery.
Documentation from SparkPost explains that reverse DNS helps confirm that the IP address used to send email is associated with the sending domain, aiding in deliverability and sender authentication.