How long should I email before cleaning up my subscriber list?

[Ezeugo]

Hi there, amazing Shopify community. A quick question for you guys. How long do I need to send out emails, to have enough data to now finally come to a conclusion on how to go about cleaning up my email list of subscribers for those who are not engaging in my emails? I have been sending emails since I started my online store with shopify to my subscribers, and I think it's been over 6 months now. I feel the data I have from these emails isn't enough as I should probably give it a year to have a more concrete data to determine subscribers that fully engage in my emails and take out the ones that don't. So how long is enough for concrete and a more substantial data?

[ADM123]

1. Start Scrubbing Your Most Active Email Lists – But Do Not Forget Your Other Lists. 
2. Start Cleaning Duplicate Email Addresses. 
3. Find “Spammy” Email Addresses and Remove Them from Your Email List.
4. Remove People Who Unsubscribe from Your Email List. 
5. Correct Obvious Typos.

[gthibault]

Hi,
To have a clean e-mail list and maintain good deliverability, you must first check the existence of e-mail addresses.

You can check the existence of email addresses by asking your new subscribers to confirm their subscription by email, and then invite your recipients to add you to their address book to avoid having your messages classified as spam.

You can also use this Shopify application which cleans your mailing lists of invalid email addresses, duplicates, etc.

Place a readable unsubscribe link and immediately unsubscribe people who request it so that unhappy recipients do not have to declare you spam (inform them that you have unsubscribed them).

You can also collect information via a form after unsubscribing in order to improve yourself (e.g. the frequency of sending is too high...)

Check your list from time to time, as formerly valid addresses may no longer be valid (people change jobs and their old postal address is deleted...)