How To Avoid Adding Duplicate Subscibers To Your Mailerlite

MailerLite is a popular email marketing platform that allows businesses and individuals to create and send newsletters, promotional emails, and other types of messages to their subscribers. However, one common issue that many users face when using MailerLite is the problem of duplicate subscribers.

What are Duplicate Subscribers?

Duplicate subscribers refer to individuals who have been added to your mailing list more than once. This can happen for a variety of reasons, such as if someone accidentally signs up twice or if you import a list of contacts that already includes some of your existing subscribers.

Why are Duplicate Subscribers a Problem?

Duplicate subscribers can be a problem for several reasons. Firstly, they can lead to inaccurate reporting and analytics. If you have duplicate subscribers on your list, it can be difficult to determine how many unique individuals are actually receiving your emails. This can make it challenging to track the effectiveness of your email marketing campaigns.

Secondly, duplicate subscribers can lead to increased costs. MailerLite and other email marketing platforms typically charge based on the number of subscribers you have on your list. If you have duplicate subscribers, you may be paying for more contacts than you actually need to reach.

How to Avoid Adding Duplicate Subscribers

Fortunately, there are several steps you can take to avoid adding duplicate subscribers to your MailerLite list. Here are some tips:

  • Use a double opt-in process for new subscribers. This means that after someone signs up for your mailing list, they will receive an email asking them to confirm their subscription. This can help prevent accidental signups and ensure that only interested individuals are added to your list.
  • Import contacts carefully. If you are importing a list of contacts into MailerLite, make sure to check for duplicates before adding them to your list. You can use tools like Excel or Google Sheets to identify duplicate entries and remove them before importing the data.
  • Use segmentation to target specific groups of subscribers. If you have a large mailing list, it may be helpful to create segments based on factors such as location, interests, or past behavior. This can help ensure that your messages are relevant to each individual and reduce the likelihood of duplicate signups.


In conclusion, duplicate subscribers can be a problem for email marketers using MailerLite and other platforms. However, by taking steps such as using a double opt-in process, importing contacts carefully, and segmenting your mailing list, you can help avoid adding duplicate subscribers to your list and ensure that your messages are reaching the right audience.