Why does GPT not recognize updated DMARC records?
Summary
What email marketers say12Marketer opinions
Email marketer from Reddit user shares that it can often take a few days for DMARC updates to be fully recognized by all systems. They suggest checking the TTL (Time to Live) of the DMARC record, as this determines how long resolvers cache the record.
Marketer from Email Geeks asks if the DMARC record has been published for a while.
Email marketer from Mailhardener suggests ensuring the DMARC record syntax is absolutely correct, as even small errors can cause validation failures. They advise using a DMARC record checker to identify any potential issues.
Email marketer from DNSQueries answers that different DNS servers might have varying update frequencies. While some DNS servers may quickly reflect changes, others may take longer, and GPT could be querying the slower servers.
Marketer from Email Geeks shares a similar experience with a client's DMARC update not being reflected in GPT, suggesting GPT might be slow to update.
Email marketer from EmailSecuritySite answers GPT uses cached data to improve response times, which can delay the recognition of newly updated DMARC records. They say the TTL of your DMARC record influences how frequently GPT updates its cache.
Marketer from Email Geeks offers to investigate potential problems retrieving the DMARC record, suggesting it might be a DNSSEC issue.
Email marketer from DMARCian answers monitoring your DMARC reports is important for understanding how different receiving mail servers are interpreting your DMARC policy. DMARCian says these reports can reveal if GPT is having trouble validating your record.
Email marketer from EmailAuth answers using online DMARC testing tools can help you verify if the record is correctly configured and accessible. EmailAuth says if the tools show the record as valid, the issue likely lies with GPT's caching or update frequency.
Email marketer from Stack Overflow user says that GPT and other services may have their own update intervals for DNS records. While manual checks pass, these services may take additional time to reflect the changes due to their internal processes.
Email marketer from MXToolbox Support states that some platforms, like GPT, may have slower update cycles than others when it comes to validating DMARC records. They recommend using MXToolbox's DMARC lookup tool to verify the record's validity independently.
Email marketer from Reddit user on Reddit states that clear your local DNS cache but this wont help as you cannot force external resolvers (like Google's GPT) to clear their cache.
What the experts say2Expert opinions
Expert from Spam Resource (John Levine) explains that DNS propagation delays are a common reason why updated DMARC records might not be immediately recognized. Different DNS servers update at different intervals, and GPT might be querying a server that hasn't yet received the updated record.
Expert from Word to the Wise (Laura Atkins) answers that GPT likely caches DNS records, including DMARC records, to improve performance. This caching can delay the recognition of updated records until the cache expires. The TTL (Time To Live) of the DMARC record determines how long the record is cached.
What the documentation says3Technical articles
Documentation from RFC Editor (RFC 7489 - DMARC specification) outlines that DMARC implementations rely on DNS caching. Resolvers cache DNS records to reduce lookup times, which means changes to DMARC records might not be immediately visible.
Documentation from Google Workspace Admin Help explains that DNS changes, including DMARC record updates, can take up to 48-72 hours to propagate across the internet. This delay is due to DNS caching by various resolvers.
Documentation from Cloudflare Help Center describes that while you can clear your local DNS cache, you cannot force external resolvers (like Google's GPT) to clear their cache. GPT will update its cache according to the record's TTL (Time To Live).