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Let’s say that Bob has a list of 5,001.
And Polly has a list of 999.
Bob has an average open rate of 10%.
Polly has an average open rate of 50%.
Both have, on average, 500 people reading each of their emails.

Just a little reminder not to be disheartened by a smaller list size. List size is a pretty meaningless number without open rate.

BUT Bob is also paying $50 a month more than Polly, for exactly the same number of people reading his emails. To be more of a Polly than a Bob, you’re going to want to delete (*deep breaths*) subscribers who aren’t engaging with your emails (opens or clicks).

ConvertKit have totally written a help article about this here, but if you’re anything like me, the thought of deleting your subscribers is utterly terrifying, and you want put a few more safety nets in place to ensure you don’t accidentally delete your biggest fan.

ConvertKit’s definition of a ‘Cold Subscriber’ is ‘anyone who hasn’t opened or clicked an email in the last 90 days and has been subscribed for at least 30 days‘. You’ve also got to remember that open rates in ConvertKit aren’t 100% accurate. If someone religiously reads your email every week but has their phone set to not download pictures (because open rates are tracked by a tiny 1 pixel picture that gets viewed), then they will count as cold, even though they freaking love you. And we definitely don’t want to be deleting them.

Reasons to Clean Your List

  • Increased open rates
  • More engaged subscribers
  • Lower ConvertKit bill
  • Improved deliverability (repeatedly sending to un-engaged subscribers can damage deliverability)


Factors to consider when spring cleaning your list

  • How often do you send emails? If you’ve sent one email in the past 90 days, and they didn’t open it, well…. you’re being a bit unreasonable to then go and delete them for not being engaged. They had nothing to engage with!
  • What’s your audience like? Are there other reasons why they may not read their emails for long periods? (e.g. busy mums or young people with chronic illness?)
  • Have you significantly shifted direction since the first people subscribed to your list?
  • Are you regularly asking people to click something in your emails? Click rates in ConvertKit are 100% accurate, and a Cold Subscriber means they haven’t clicked a link in one of your emails in the last 90 days either (which usually means they’re pretty damn cold… but if you email out only once a month with a full blog post… then maybe they read that but haven’t had reason to click…)
  • Have you run your list through BriteVerify (which identifies all the bad/spammy email addresses)? Click here to see my blog post all about this!
  • Do you use a custom sending domain? If you have single opt-in, there’s a chance that every single one of your emails you’ve ever sent to some subscribers will have gone straight to spam. If this looks terrifying, I can do it for you 🙂

ConvertKit’s method (of emailing everyone once and then deleting a couple of weeks later if they don’t click) seems pretty harsh, no matter how wonderful and clear the subject line is.

I advise sending at least 3 emails to your cold subscribers, over a 3 – 4 week period, with increasingly firm subject lines.


Step 1 – Tag Your Cold Subscribers

First up we’re going to want to tag all your Cold Subscribers that you’ve got right now. (We do this so that we know exactly who we’re dealing with and it doesn’t get messy with new people becoming Cold).

Create a new tag called ‘Cold Subscribers’.

Go to Subscribers → and change the dropdown option from Confirmed Subscribers to Cold Subscribers.

Select all these Cold Subscribers  → Bulk Actions → Tag (and select ‘Cold Subscribers’).


Step 2 – Set up an Automation Rule

It’s going to look something like this…

You need to create the Destination URL page on your website. Write something about how happy you are that they’d like to continue receiving your emails.

I also like to tag them something like ‘Warmed Up’ because it’s nice to see how well you’re doing in reviving Cold Subscribers. I just find it motivational.


Step 3: Write your Broadcast emails

Email 1
Keep this one quite light and friendly. Make sure the subject line is clear but not too firm. You’ve noticed the may not have been reading your emails for a while. That’s fine. Things happen. People change. Or maybe my system is wrong and you’re an avid reader. If they’d like to continue receiving your emails, click here (and this is where you put in the link trigger automation you set up in Step 2). If you’d like to just Unsubscribe, click here (and then the url you want to link them to is {{ unsubscribe_url }} . You’re going to be emailing them twice more over the next couple of weeks, but if they click to stay on the list now, it’s all good, no more scary deleting talk – phew!

Email 2
This one is a little more firm. You wrote to them last week about how they’re not opening your emails these days 🙁 If there’s been some horrible mistake, click here to continue receiving them (and this is where you put in the link trigger automation you set up in Step 2). If you’d like to just Unsubscribe, click here (and then the url you want to link them to is {{ unsubscribe_url }} .
You can also tell them in this email that you’re going to be sending them one more email before you take them off your list and stop emailing them. It’s getting important that they click to continue hearing from you, or they click to Unsubscribe, that’s fine too.

Email 3
Make the subject line for this super clear, something like: Action Required by X date to continue receiving my emails
Make this super clear and super firm. If you don’t click to confirm that you’d like to continue hearing from me by X date, then I will remove you from my list and you won’t hear from me again (and put in the link trigger automation you set up in Step 2). There’s not really a need to give them the Unsubscribe option here because if they don’t want to hear from you again, you’re going to be deleting them very soon anyway, there’s no last chances.


The delay between these 3 emails is going to depend entirely on how often you usually email your list. If you usually email them weekly, then these emails can probably be one a week. If you usually email them monthly, then I’d probably send these emails out over 2 months or so.

One other note on this bit and the emails you send to try and re-engage them… if someone decides at Email 1 that they’re going to do nothing and wait and be deleted… and then they get Email 2 and Email 3 from you, they might be kinda annoyed and report you as spam (which isn’t good). So you need to make sure it’s super clear that if they’ve opened an email, and don’t want to stay on your list, just hit unsubscribe and they won’t hear from you again.


Step 4: The Deleting Bit

Okay, it’s crunch time. These people either didn’t open any of your 3 emails with super clear subject lines, or they opened them and didn’t click to continue hearing from them. This bit is scary, but that’s okay. Think of your clean list and soaring open rates!

  • Firstly we’re going to spot check the subscribers who you’re about to delete. Click into the Cold Subscribers tag that we created at the start. And just click into a handful of those subscribers. Double check that they’ve not been opening your emails in their Email History. You can hover over the circles next to the emails and it will tell you if it was delivered, opened, clicked, bounced, etc.
    If you find any subscribers up for deletion who it looks like definitely shouldn’t have found their way into the deletion pile, you’re going to want to figure out why that is before you delete them. i.e. don’t proceed and delete them!
  • Next, we’re going to want to export that list of Cold Subscribers (the people in the tag). Click into the tag → select all → Bulk Actions → Export. Make sure you’ve safely got that .csv file downloaded from your inbox before you proceed.
    We do this for 2 reasons. 1) To reassure you that if you’ve made some horrible mistake, you can just import this list back in. 2) When you delete a subscriber, you have no record whatsoever that they were ever your subscriber. (Whereas if they unsubscribe then you do have a record of them). So it might be helpful one day to know who was once a subscriber. Idk. I just feel better if I export before I delete.
  • Okay, you’ve spot checked that everything seems right with the people you’re about to delete, you’ve exported a list of people you’re about to delete, now the moment of truth – you delete them! Click into the Cold Subscribers tag → select all → Bulk Actions → Delete.

It’s okay! You just deleted people who haven’t opened or clicked on a single one of your beautiful emails in 90 days and who didn’t care when you very politely invited them to stay on your list three times. You just don’t need those kinda people in your life or on your list!


Step 5: Getting your monthly bill reduced!

If, as a result of deleting cold subscribers, you’ve come below a subscriber threshold in ConvertKit (so you’ve just dropped under 1k, 3k, 5k, 8k, 10k, etc) then make sure you email ConvertKit to let them know. Your next invoice will be pro-rated to the amount of the month you had more subscribers, and the amount of the month you had less. Your ConvertKit plan/invoice does not automatically downgrade when your subscriber number decreases. You can find out more information about this here and see the pricing levels here.


Important/Interesting Notes

  • It’s really important that you get the link trigger automation correctly set up in the emails to your Cold Subscribers. When you click on a link in the email editor, a little lightning bolt appears next to the url. If you don’t see the lightning bolt, no automation is going to happen, and this is all going to be in vain – womp womp. (Note that you’re not going to have a lightning bolt for the unsubscribe option, that’s just a special type of regular link).
  • In an ideal world, you actually want people to Unsubscribe instead of you deleting them. If you delete them, all their subscriber data is lost forever. If they unsubscribe themselves, then should they re-subscribe again one day, all their tag/form/Email History/etc info will be there. Just something to bear in mind when you’re writing your emails… unsubscribing > deleting.
  • I usually recommend that you exclude the Cold Subscribers tag from your regular newsletters/broadcast emails whilst you’re completing the cleaning process so they’re now only getting emails inviting them to stay on your list.
  • I’ve had some clients offer Cold Subscribers a special freebie to incite them to re-engage. It can work really well. You’d obviously have to rejig the copy of your emails a bit, and you can actually link them straight to a PDF through a link trigger automation rule (and then even on to a more extensive warming back up sequence!). This is a little more advanced though. Happy to chat through helping you do this.
  • I like to create 2 segments so I can see right at the top how I’m doing with the warming up process! One segment is for everyone with the Cold Subscribers tag (i.e. people I’m trying to warm up) and the second segment is for everyone with the ‘Warmed Back Up’ tag (i.e. people who’ve clicked to stay – yay!).

Has this blog post motivated you to clear out some of your cold subscribers? Let me know in the comments!


You should also check out my Ultimate ConvertKit Tidy Guide where I walk through a full process to review and tidy every part of your ConvertKit account so it’s working optimally and there’s no dead ends or sillies left from when you were just starting out (we’ve all got them, don’t worry!). It covers:

  • Default account settings
  • Email templates
  • Forms
  • Sequences
  • Tags
  • Segments
  • Automation rules (eeek! stay calm!)
  • RSS feeds
  • Broadcasts

And then 6 bonus ideas if you want to go all out

Want someone to walk you through ConvertKit 1:1, or even better, just do it for you? Please feel free to contact me about my 1:1 ConvertKit services.


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