When I tell people about Inbox Nanny, the most common pushback is some version of: "But it only takes me a second to delete those." And that's true. Deleting one cold email takes a second. The cost isn't in the deleting.

The cost is in what the interruption breaks. Here's the math.

The per-email cost

There are three components to the time cost of any cold email, not just the delete itself:

1. Notification awareness: ~3 seconds. You hear the ping, see the badge, your eyes go to the source.
2. Triage and delete: ~7 seconds. Read sender, scan subject, decide "this is cold," delete or archive.
3. Context switching back: ~23 seconds. This is the silent killer.

The 23-second number is from a 2008 UC Irvine study on workplace interruptions. It found that after any interruption, knowledge workers take an average of 23 minutes 15 seconds to fully return to their original task. But that's for substantive interruptions like a meeting or a coworker question. For micro-interruptions like an email notification, follow-up research refined this to about 23 seconds for context switching alone (not full task recovery).

So one cold email costs you roughly 33 seconds of effective time, not the second it takes to delete.

How many pitches per week.

From our scan of 200 inboxes, here's the weekly distribution:

47 minutes a week is the median number. If you're a founder or sales/marketing leader, it's significantly more.

The compounding cost

47 minutes a week sounds small. Two ways it compounds:

1. Over a year, it's a full work week

For a founder, that number is 65 hours - almost two work weeks.

2. Deep work loss is non-linear

The 47-minute number is the direct cost. The indirect cost is harder to quantify but probably larger: cold emails interrupt deep-work blocks disproportionately.

If you're trying to write a strategy doc, code a complex feature, or have a serious 1:1 with someone - any interruption is amplified. A 33-second cold-email-triage in the middle of writing breaks flow state, and flow state takes much longer than 33 seconds to re-enter. Some researchers put the cost of a flow-state break at 15+ minutes.

So if you get one cold email during a flow block per day, that's not 33 seconds × 5 = 2.75 minutes per work week. It's potentially 15 minutes × 5 = 75 minutes per work week of compromised deep work.

It's not the email you read. It's the work you didn't.

What you can actually do.

Three approaches, from least to most effective:

Option 1: Gmail filters (free, partial)

Set up Gmail filters that auto-archive emails matching common cold patterns: phrases like "saw your work," "quick question," "15 minutes," or domains you've manually blacklisted. Catches maybe 60% of cold pitches with minimal false positives.

Pros: free, you control it. Cons: maintenance burden, misses anything personalized, doesn't stop the email from being sent in the first place.

Option 2: Get out of the databases (long-term fix)

The reason you get cold email is because your email is in B2B databases. Stop the supply at source. Opt out of all 15 major databases. If they don't have your email, SDRs can't use their tools to find you.

Pros: permanent (assuming you keep doing it - 22% re-listing rate). Cons: takes a few hours to do manually, and you have to maintain it quarterly.

Option 3: Automate both (this is what we built)

The reason I built Inbox Nanny is that doing options 1 and 2 manually is itself a maintenance burden. Auto-archive incoming cold pitches with confidence scoring AND auto-remove yourself from the databases that source them, monitored continuously. You don't think about it after setup. The 47 minutes a week goes away.

That's the whole pitch. It's not subtle.

The cynical question

You might be thinking: "But Oded, you used to do cold email yourself as a marketer. Aren't you being a hypocrite?"

Yes and no. I still think cold email is fine when it's well-targeted. A pitch from someone who genuinely understands what I do and proposes something specific is worth my 33 seconds. The problem isn't cold email - it's that databases sell access to people who don't care about targeting, who blast 500 pitches a day at low-fit prospects.

If those 500-pitch-a-day senders couldn't find me, they'd send fewer pitches, more carefully. Removal isn't anti-marketing. It's pro-targeting. More on that here.