What is a shared IP address and how does it affect email deliverability?

Email marketer from Litmus explains that with shared IPs your deliverability can be influenced by the sending practices of others. You can inherit their reputation problems, even if you follow email best practices.

Email marketer from Campaign Monitor explains that shared IPs have advantages that include; cost effectiveness, easier management, immediate deliverability and scalability. They also discuss the disadvantages of deliverability with shared IPs

Email marketer from Mailjet explains that a shared IP address means multiple senders use the same IP to send emails. They share that it's cost-effective and requires less management but can be affected by other senders' practices, potentially harming deliverability if those practices are poor.

Email marketer from Constant Contact explains that to improve deliverability on a shared IP you must use permission-based lists. You must send relevant content, authenticate your email, and monitor your sender reputation.

Email marketer from Reddit explains that with a shared IP, your email deliverability is tied to the reputation of all users on that IP. They explain that if one user sends spam or has poor engagement, it can negatively impact your deliverability, even if you follow best practices.

Email marketer from GlockApps says that monitoring your sending reputation is crucial when using a shared IP. They explain that you need to be aware of the reputation of the shared IP you're using, as it directly impacts your ability to reach inboxes.

Email marketer from Email Marketing Forum explains that shared IP addresses often require a 'warm-up' period, where sending volume is gradually increased to build a positive reputation. This helps to avoid triggering spam filters and ensures better deliverability over time.

Email marketer from SendPulse shares that a shared IP is used by multiple senders and that the reputation of the IP is affected by all users. They say that poor sending habits from one user can negatively affect the deliverability for all users sharing that IP.

Expert from Email Geeks shares that in the past, blocking was based on IP addresses, and shared IPs could be problematic. However, since around 2015, IP reputation has become less crucial, particularly at consumer mailbox providers, making shared IPs less of a concern.

Expert from Word to the Wise shares that shared IPs are used by multiple senders and performance depends on the IP reputation. If other senders have poor sending practices, it can affect your email delivery even with good practices.

Expert from Email Geeks explains that a shared IP address is an IP address that many different companies use, giving the example of G Suite hosted domains. Also, some ESPs have shared IPs where all their customers use the same pool (mailchimp and AmazonSES). Others offer customers the ability to have an IP (or many IPs) all to themselves.

Expert from Word to the Wise explains that shared IPs often require a warm-up period for new senders. Gradually increasing sending volume helps build a positive sending reputation and avoid being flagged as spam.

Documentation from Amazon Web Services explains that Amazon SES uses shared IP addresses for sending emails, where multiple users share the same IP. They actively monitor sending practices to maintain a good reputation for these IPs, minimizing negative impacts on deliverability.

Documentation from Digital Ocean explains that Shared IPs are a cost-effective way to send email, but they come with risks. They elaborate on the need for senders to practice good sending habits and monitor their reputation, as it reflects on all users sharing the IP.

Documentation from SparkPost defines a shared IP address as an IP used by multiple senders, highlighting that deliverability can be affected by the sending behavior of others on the same IP. SparkPost manages IP reputation to mitigate risks.

Documentation from Google explains that IP reputation is a factor in deliverability. They explain that using shared IPs can mean deliverability is influenced by the actions of others using the same IP, and that this is important for senders to consider when determining their IP strategy.