A long gap means recipients have forgotten who you are, so a normal message reads as unsolicited and produces complaints that damage future delivery. Restarting requires acknowledging the gap, sending to the most recent contacts first, and removing anyone who does not respond.

Why restarting is risky

The addresses are still valid and the relationship is not. Somebody who gave you their address two years ago and heard nothing has forgotten, and a message arriving now reads as unsolicited.

The consequence is junk complaints. Enough of those, in a short period, damages your sending reputation, which affects whether any of your mail arrives, including quotes and invoices sent from the same domain.

That is the real risk. Not that the campaign underperforms, but that a badly handled restart makes your ordinary business email less likely to be delivered for weeks afterwards.

Cleaning before sending anything

Remove anything that has hard bounced

Addresses that were already failing. Sending to dead addresses is a strong negative signal and it is entirely avoidable.

Remove obvious problems

Typos, role addresses at defunct businesses, and anything that looks like it was entered incorrectly.

Sort by recency

The most recently added or most recently active contacts first. They are the most likely to remember you and the least likely to complain.

Check the consent basis

Where you cannot establish how an address was obtained, that is a genuine problem rather than a technicality. Canadian rules on commercial email require a consent basis, and consent obtained long ago may have expired depending on its type.

Anything you cannot account for should not be mailed.

Sending in stages

Not everything at once, which is the mistake that produces the complaint spike.

Send to the most recent contacts first, in a modest batch. Watch the complaint and unsubscribe rates. If they are acceptable, send to the next batch. If they are not, stop, because the problem will be worse in the older segments.

Spreading it over a couple of weeks also looks more like normal sending behaviour than a sudden burst to thousands of addresses after two years of silence, which is exactly the pattern filtering systems watch for.

What the first message should say

Acknowledge the gap, plainly, in the first line. Not as an apology, as an orientation.

Then three things: who you are and where they know you from, what you are going to send from now on and how often, and an easy way to say no. That last one should be prominent rather than buried, because an unsubscribe is considerably better than a junk complaint.

Include something worth having in the message itself. A restart message that only announces a restart gives the recipient no reason to stay.

What to avoid: launching straight into a promotion, which reads as somebody appearing after two years to sell something.

The explicit re-permission approach

The more conservative option and sometimes the right one.

Rather than resuming, ask people to confirm they still want to hear from you, and remove everyone who does not respond.

That produces a much smaller list and a genuinely engaged one, with almost no complaint risk. It is uncomfortable because the list shrinks visibly, and the shrinkage is honest: those people were not going to read anything anyway.

One constraint matters here: a message asking for consent is itself a commercial electronic message. Where implied consent has already expired, you have no basis to send even the confirmation request, so this approach works while the window is still open rather than after it has closed.

Subject to that, it is the right approach where the gap is long, the consent basis is uncertain, or the list was assembled from several sources.

Removing the ones who do not respond

The part businesses resist and the part that matters most.

After the restart, anyone who has neither opened nor clicked across several messages should be removed or moved to a group contacted once a year at most. Keeping them makes every future send worse.

Given that open tracking is now unreliable, clicks and replies are the better signals, and the absence of any interaction over several sends is the practical test.

A list of two hundred people who read what you send is worth considerably more than eight hundred where six hundred never open anything, because the six hundred are actively damaging delivery to the two hundred.

What to expect

Higher unsubscribes than a normal send, which is fine and is the list correcting itself. Some complaints, which should be a small number. And a smaller remaining list that performs better than the large one did.

The realistic outcome for a two-year gap is retaining a minority of the addresses. That is not a failure, it is an accurate measure of who was ever going to engage.

Not getting here again

The gap is the problem, and the prevention is modest and regular contact rather than occasional bursts.

Two seasonal messages a year is enough to keep a list warm, and it is little enough work to survive a busy period. A business sending twice a year for five years never needs a reactivation campaign, which is the argument for a sustainable cadence in reading email metrics honestly.

Frequently asked questions

Why is restarting a cold list risky?

Recipients have forgotten who you are, so the message reads as unsolicited and produces junk complaints, which damage delivery of all your mail including quotes and invoices.

What should I do before sending anything?

Remove hard bounces and obvious errors, sort by recency, and check the consent basis for each address. Anything you cannot account for should not be mailed.

Should I send to everyone at once?

No. Send to the most recent contacts first in a modest batch and watch the complaint rate. A sudden burst after years of silence is exactly what filtering systems watch for.

What should the first message say?

Acknowledge the gap in the first line, say who you are and where they know you from, what you will send and how often, and make unsubscribing easy and prominent.

What is the re-permission approach?

Asking people to confirm and removing everyone who does not respond. Note the request is itself a commercial message, so it works while implied consent is still live rather than after it expires.

What should I expect?

Higher unsubscribes than normal, a small number of complaints, and retention of a minority of addresses. That is an accurate measure of who was ever going to engage.

West Coast Media Solutions Inc. provides web design, web development, hosting, digital marketing, and business consulting to organisations across Canada, drawing on more than twenty-five years in the field.

List sitting untouched for two years?

We clean it, stage the restart so it does not damage your delivery, and set a cadence that stops it going cold again.

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