Is it necessary to warm up a domain when migrating to a new ESP?

Email marketer from Email Geeks responds with "maybe", explaining that if moving from one shared IP ESP to another, the key question is the size and frequency of sending to the subscriber list. If the list is relatively small, warming may be unnecessary.

Email marketer from GlockApps explains IP warming (also known as IP warm-up) is the practice of gradually increasing the volume of emails sent with a new IP address. This process allows you to build a positive sending reputation with ISPs and email providers. If you suddenly start sending a large volume of emails with a new IP, it can raise red flags and your emails may be marked as spam. Proper IP warming helps to ensure that your emails reach the inbox.

Email marketer from GMass recommends warming up your IP address to get good email deliverability with your new email sending system. GMass says not to start sending big campaigns right away.

Marketer from Email Geeks shares concerns, stating that moving ESPs is risky unless there are serious issues with the current one. Moving to a shared IP and using an ESP that doesn't recommend warming up is particularly worrisome.

Email marketer from Omnisend shares that you should warm up your IP address to tell ISPs that you’re not a spammer and give yourself a chance to build a good sender reputation. Even though it takes extra time, it’s worth it to improve your email deliverability.

Email marketer from Mailjet shares that warming up your IP address is necessary. Warming up an IP address involves gradually increasing the volume of emails sent through it over a period of time. This helps to establish a positive reputation with Internet Service Providers (ISPs) and ensures that your emails reach the inbox. Without warming up, your emails are more likely to be marked as spam.

Email marketer from ActiveCampaign explains that if you don't already have an established reputation, then you'll need to build one. This is done by gradually increasing the amount of email you send from your new dedicated IP addresses, and is often referred to as warming your IP addresses.

Email marketer from Reddit explains that it's important to warm up your domain when moving to a new ESP, as your domain reputation is essentially starting over with the new ESP. This is to ensure that your emails don't get flagged as spam by ISPs.

Email marketer from Reddit suggests gradually increasing sending volumes and actively monitoring deliverability metrics. They share that proper warm-up is crucial for establishing a positive sender reputation with the new ESP and improving deliverability rates.

Email marketer from Email Geeks shares that they counsel clients to warm their domain when moving to a shared IP at a new ESP, starting small and monitoring performance.

Email marketer from SendGrid explains that IP warming is the process of gradually increasing the volume of email sent from a new IP address. It helps to establish a positive sender reputation with Internet Service Providers (ISPs). Proper IP warming demonstrates that you are a legitimate email sender and not a spammer, which improves deliverability and helps you reach your recipients' inboxes.

Email marketer from StackExchange answers that when switching from one ESP to another, you should definitely warm up your new IPs. Your sending reputation is tied to your IP, so you're starting from scratch with the new ESP. Warming up an IP is the process of gradually increasing the amount of emails you send to try and build a good reputation with the ISPs.

Expert from Spam Resource shares that they are dealing with low deliverability and Google putting their emails in spam even though its opt-in subscribers. Spamresource recommends warming up your IP. Do this by sending small volumes of email and increasing your sending size as you go along.

Expert from Email Geeks answers that migrating from one platform to another, or even from shared to dedicated IPs, will require warming.

Expert from Word to the Wise explains that if you are starting with new IPs and domains, you will need to warm them up. Without warming up, your mail will likely get blocked, filtered or rate limited due to lack of reputation.

Expert from Email Geeks explains that the process of moving from ESP to ESP is about ensuring the filters recognize the new ESP as a legitimate source. She suggests that moving between shared IPs is less difficult nowadays. She also advises to defer to the ESP experts on warming.

Expert from Spam Resource answers that Warming up is important as each IP address builds its own reputation. You can’t inherit good reputation from another IP address. You can inherit bad reputation, but not good. Start at a low sending rate, check to see if your mail is being delivered, and then slowly increase your sending rate and test to see if your mail is still being delivered.

Expert from Email Geeks explains that even on shared IPs, domain warming is important. He cites an example where ignoring warming up led to spam folder placement.

Documentation from Google explains to gradually increase the volume of mail sent using new IPs. Google recommends following the best practices for sending emails and monitor your sending reputation in Postmaster Tools.

Documentation from Postmark explains that warming an IP address or a sending domain is the process of building your sender reputation to improve your email deliverability. Every email sent from a new domain or IP address contributes to your reputation with mailbox providers. When starting out, your reputation is like a blank slate - mailbox providers don't know if you're a legitimate sender or a spammer. Warming up is an opportunity to show them that you are a responsible and trustworthy sender.

Documentation from Amazon Web Services explains that warming up an IP address is important for establishing a sending reputation with ISPs. It involves gradually increasing sending volume to avoid being flagged as spam. When you switch to a new dedicated IP address for sending email, you don't have a sending reputation yet. ISPs don't know who you are, and they treat your email with suspicion. By gradually increasing your sending volume, you prove to ISPs that you're a legitimate sender. You can choose to warm up an IP address manually, or have Amazon Pinpoint automatically manage the warm-up process for you.

Documentation from Microsoft explains that you should never suddenly send large volumes of emails. When you send email from a new IP address, start by sending small volumes, then slowly increase the volume over a few weeks. Microsoft recommends that you create a more even distribution of email volumes. Try to send roughly the same number of emails every day instead of sending large volumes of emails on some days, and small volumes of emails on others.

Documentation from SparkPost explains that IP warming is the practice of gradually increasing sending volume from a new IP address, establishing sender reputation with mailbox providers. Skipping this step could lead ISPs to perceive your mail as unsolicited, resulting in deliverability issues. By gradually increasing volume, you show ISPs you are a legitimate sender.