When you switch from one email service provider to another, the email server used for sending your emails will change as well. Your new ESP's email servers are not allowed to send large numbers of emails at the same time, so to make sure the emails are delivered properly, you will need to start with a small number of emails and increase the number of emails over time.
The email warm-up process plays a crucial role in email deliverability, avoiding it can result in a lot of emails not being delivered permanently.
Basic requirements and Recommendations before the warm-up
Before you import your customers into Growlytics, it's important you clean your email list. There are many services out there that you can use like zerobounce.net or neverbounce.com. This will remove invalid, misspelled, and “catch-all” addresses — this is likely to increase your open rate.
Set up SPF, DKIM, and Tracking signatures.
Configure the PTR and reverse DNS records with your email service providers.
Use the below steps to warm up your email servers:
If you haven't imported customers into Growlytics, you will need to import your customers from the previous marketing automation platform to Growlytics.
Create small segments which involve your most active customers.
Follow the warm-up plan given below and run email campaigns accordingly.
During your warm-up, try not to send more than 1 campaign per day.
Let’s say you have 20,000 contacts in your database. When warming your IP(s), your campaign sends might look something like this:
Day1: Send 50-100 Emails
Day2: Send 100-200 Emails
Day4: Send 200-300 Emails
Day5: Send 300-400 Emails
Day7: Send 400-500 Emails
Day8: Send 500-600 Emails
Day10: Send 600-700 Emails
Day11: Send 700-800 Emails
Day13: Send 800-900 Emails
Day14: Send 900-1000 Emails
Day16: Send 1000-2000 Emails
Day17: Send 2000-3000 Emails
Day19: Send 3000-4000 Emails
Day20: Send 4000-5000 Emails
Day22: Send 5000-6000 Emails
Day23: Send 6000-7000 Emails
Day25: Send 7000-8000 Emails
Day26: Send 8000-9000 Emails
Day28: Send 9000-10000 Emails
Day29: Send 10000-12000 Emails
Day31: Send 12000-14000 Emails
Day32: Send 14000-16000 Emails
Day34: Send 16000-18000 Emails
Day36: Send 18000-20000 Emails
Day37: Send 20000-22000 Emails
Keep track of your campaign metrics. If you think you are getting more bounces and complaints, do not go to the next step, keep your campaign customers the same and try sending the emails once again.