Is a 30-day waiting period required when moving to a new IP range using BYOIP?
Summary
What email marketers say10Marketer opinions
Marketer from Email Geeks shares it has not been a problem in practice, but this depends on if the new ASN is known. Is it a true hot-swap where you’re moving large amounts of existing traffic en masse with the the IPs, etc.
Email marketer from StackOverflow explained "DNS records should be propagated before any email is sent from an IP to ensure deliverability and avoid being flagged as spam."
Marketer from Email Geeks explains that SparkPost doesn't use AWS's BYOIP provisioning. He mentions they typically look at 2-4 weeks, mostly for internal scheduling time. The 30 days thing presented in that note doesn't make sense to him as a technical requirement as that's not how BGP works.
Marketer from Email Geeks responds to the question about a 30-day BGP requirement when bringing over an IP range. Kieran states the answer may depend on whether the IP range is currently sending mail or dormant. They haven't heard of the 30-day BGP requirement and don't think they've run into it with other BYOIP customers.
Email marketer from EmailGeeks Forum stated "BGP propagation times are relatively quick. However, mailbox providers might want to check if the IPs have been stable to protect against spam."
Email marketer from Reddit says "The 30 day thing sounds excessive. I usually do IP warming over 2-3 weeks with good results".
Email marketer from SparkPost Resource emphasizes building a good sending reputation. They advise against sending large volumes of email from a new IP address immediately. A gradual warm-up process is recommended which contradicts a hard 30-day limit.
Email marketer from Mailjet Blog explains that while a 30-day waiting period isn't explicitly mentioned, they emphasize the importance of IP warming. They recommend gradually increasing sending volume over time to establish a positive reputation with ISPs, which indirectly addresses the waiting period concern by suggesting a gradual approach.
Email marketer from Reddit shares "I've moved IPs before with no major issues by focusing on building a good reputation fast, gradually increasing volume, and using good email authentication."
Email marketer from SendGrid Blog highlights the importance of preparing your IP address for sending. This includes setting up rDNS records and SPF/DKIM/DMARC authentication. These steps establish trust and credibility with ISPs, which might mitigate the need for a strict 30-day waiting period if implemented correctly.
What the experts say4Expert opinions
Expert from Word to the Wise discusses changing IP addresses and notes it can take time for the email ecosystem to notice. They recommend warming up your IP by sending low volumes of emails to engaged users and then increasing volume over time. No 30 day rule is specified though.
Expert from Email Geeks shares insights into route stability, mentioning discussions about considering routes unstable if they haven't been stable for a certain length of time. He suggests a few days seems conservative.
Expert from Word to the Wise explains that IP warming is about building a good sending reputation with ISPs. While not explicitly stating a 30-day rule, she recommends gradual volume increases and monitoring deliverability metrics, which indirectly suggests avoiding sending large volumes too soon. Thus, while the 30-day rule might be excessive, patience is key.
Expert from Email Geeks states that Sendgrid is naming Microsoft as the source of the 30-day requirement.
What the documentation says4Technical articles
Documentation from Microsoft Support encourages senders to ensure their sending IPs are not blocked and explains how to get delisted. The documentation does not mention any waiting period, instead recommends you follow their policies.
Documentation from RFC explains ASN changes, there is not a specific time or duration described.
Documentation from AWS explains the process of advertising your BYOIP address range. It states that provisioning can take up to 3 weeks, separate from advertising which has a shorter time frame. No mention is made of a mandatory 30-day no-send period, implying flexibility after provisioning.
Documentation from Google Postmaster Tools emphasizes the importance of following best practices for bulk sending. This includes authenticating your email, avoiding spam triggers, and monitoring your reputation. The guidelines do not explicitly state a 30-day waiting period but indicate that a gradual warm-up is essential for good deliverability.