The Email Mistakes Quietly Costing You Revenue: A Klaviyo Audit with Sergey Kostenko
with Sergey Kostenko, Email Marketing Team Lead, UAWC Agency · Hosted by Alex Chich
The big ideaMost brands treat email as a channel they can switch on and leave alone. That single assumption is the most expensive mistake in their Klaviyo account, and almost everything that leaks revenue traces back to it.
Best practices get you to a baseline. After that, the growth is in the details most operators skip: whether revenue is attributed correctly, whether flows fire on the right triggers and filters, whether the emails even reach the inbox. This episode is a working audit of exactly those checks.
Sergey Kostenko is email marketing team lead at UAWC Agency, where he runs performance and retention email for e-commerce and B2B brands across Klaviyo and Omnisend. His work covers flow architecture, deliverability recovery, technical integrations, and the reporting that shows whether any of it is actually working.
He and Alex go through it in order: how attributed revenue actually works, what a real account audit looks like, how to build pop-ups and sign-up forms that convert, and why welcome and abandonment flows decide whether the sale happens. Sergey stays blunt about the mistakes that cost the most, and the small technical fixes that quietly add up.
Selected Links From the Episode
In This Episode
- →Why treating email as set-and-forget quietly leaks revenue
- →The account audit that shows what your dashboard is hiding
- →What attributed revenue actually measures, and why the whole account is fiction if tracking isn't set up right
- →Pop-ups and sign-up forms: offers that convert and the A/B tests worth running
- →Welcome flows that earn the first sale instead of wasting the first click
- →Abandoned cart versus abandoned checkout, and why the difference changes the revenue
- →Deliverability, integration health, and the profile filters that stop flows from overlapping
People Mentioned
Sergey Kostenko
Email Marketing Team Lead, UAWC Agency
Alex Chich
Host, Beyond the Algorithm
