Does shifting email volume between IPs affect deliverability and IP reputation across different mailbox providers?

Email marketer from StackExchange shares that splitting email volume across multiple IPs without a proper strategy can dilute your reputation and make it harder to achieve good inbox placement.

Email marketer from Mailjet shares that a sudden increase in email volume from a new IP can trigger spam filters at mailbox providers like Gmail, Yahoo, and Outlook, and suggests gradually increasing volume over time.

Marketer from Email Geeks clarifies that receivers generally don't share directly, but indirectly, if one receiver shares with spam filters or blocklists used by another, there might be an influence.

Email marketer from Reddit states that if you suddenly shift a lot of volume to a new IP, mailbox providers may view this as suspicious and negatively impact your reputation and deliverability.

Email marketer from Email on Acid states that sending a large volume of emails from a new IP address will likely result in deliverability issues. They advise warming the IP slowly and carefully.

Email marketer from GlockApps says that changes in sending volume from an IP address can trigger spam filters at major mailbox providers. Gradual warming is important.

Email marketer from Litmus shares that a new IP address starts with no reputation, so sending high volumes of email immediately can flag your messages as spam. Warming helps establish a positive reputation.

Email marketer from Neil Patel Digital explains that abruptly shifting email volume to a new IP without proper warming can negatively affect deliverability and reputation because mailbox providers see it as suspicious activity.

Email marketer from SendGrid explains that IP warming is essential for maintaining good deliverability when shifting volume between IPs because it allows you to build trust with mailbox providers gradually.

Marketer from Email Geeks shares that if the delivery from IP X was bad due to traffic issues, sending the same traffic from IP Y would also cause IP Y to have issues. The Microsoft problems might be noise or Microsoft catching up to the bad traffic.

Marketer from Email Geeks explains that mailbox providers generally don't share data, so Hotmail wouldn't know what's happening with Gmail.

Expert from Email Geeks shares that several people have noted a change in delivery to Outlook over the last couple weeks, suggesting changes on Microsoft's end and coincidental timing.

Expert from Word to the Wise explains that IP reputation is important because many, many filters use IP address to make filtering decisions. It’s just one tool, but it’s a commonly used one.

Expert from Word to the Wise explains that a new IP address requires careful management and a structured warm-up process to build a positive sending reputation with ISPs.

Expert from Word to the Wise explains that warming practices on IP addresses are a delicate balance to manage and it's important to start with a low volume and slowly increase it over time.

Documentation from SparkPost suggests monitoring sender reputation metrics and gradually increasing email volume when shifting between IPs to maintain deliverability and avoid triggering spam filters.

Documentation from RFC Editor outlines SMTP standards and best practices for email sending, highlighting the importance of consistent sending patterns to avoid being flagged as spam.

Documentation from Microsoft states that IP reputation is a key factor in determining whether email is delivered to the inbox or spam folder, and a sudden change in sending patterns can harm reputation.

Documentation from Google confirms that sending email from a new IP address can impact deliverability and it's crucial to follow IP warming best practices to establish a positive sender reputation with Gmail.