Which Plans Qualify for Premium Inboxes Coupon Code FIRST20?

FIRST20 was accepted on the Start Up, Growth, Enterprise, and Insured Infrastructure configurations checked for this guide. The code gives 20% off an eligible first purchase.

That leaves the more useful buying decision. How many mailboxes should you order, and which level of service does your operation need?

I've used Premium Inboxes while setting up cold email infrastructure for nearly 56 clients. My largest setup handled 100,000 cold emails per month without deliverability issues in my experience.

For a purchase at that scale, I'd work backward from the campaign workload before choosing a plan. A cheaper unit price helps when the accounts have a job to do.

The plans that accepted FIRST20

These are the Google Workspace configurations checked, with every example using at least 100 mailboxes.

The mailbox quantities shown above are examples, not minimum purchase requirements. Whether you purchase 1 mailbox, 100 mailboxes, or another quantity, FIRST20 gives you 20% off your eligible first purchase.

The checkouts behind these examples used four-week billing. The discounted column shows the introductory mailbox charge, before any other order items or applicable taxes.

FIRST20 also applied to the standard Microsoft 365 configuration checked with 100 mailboxes.

The published quantity bands are 1–249 for Start Up, 250–1,249 for Growth, and 1,250 or more for Enterprise. You can review them on the Premium Inboxes pricing page.

For an existing account or an individually negotiated purchase, confirm eligibility under the first-purchase offer before budgeting for the discount.

Start with the total workload you need to support

Before choosing a tier, define what the monthly sending target includes.

A target of 100,000 total campaign emails is different from a target of contacting 100,000 new people. In the second case, follow-ups can add considerably more sending work.

For planning, count every outbound message your campaign expects to send. Use the number of days you'll actually run campaigns, then estimate the workload each active mailbox will carry.

Here is an illustration for 100,000 total campaign emails over 22 sending days.

The mailbox counts are rounded up. These are planning scenarios, separate from the actual configuration of my 100,000-email client setup.

Choose the daily pace using the condition of your accounts, provider requirements, and campaign evidence. The table shows how much the purchase changes when that assumption changes.

At an assumed 20 campaign emails per day across 22 sending days, 100 active mailboxes cover 44,000 emails. A 100,000-email target would need more capacity at that pace.

That's the calculation I'd resolve before being attracted by a particular plan name.

Leave room for accounts that aren't sending

Purchased capacity and available capacity can differ.

Some mailboxes might still be preparing for launch. Others could be reserved for a different client or paused while your team investigates an issue. Count the accounts that can actually serve the campaign.

Using the same illustrative workload, 250 active mailboxes sending 20 campaign emails each over 22 days would provide capacity for 110,000 emails.

Now take 25 of those mailboxes out of the active pool. The remaining 225 support 99,000 emails under the same assumptions.

That is enough to change whether you meet the target.

I'd account for this before approving the purchase. Decide how much spare capacity the operation needs and when additional accounts must be ready. Avoid making a budget that depends on every mailbox contributing its full planned workload every sending day.

For agency work, do the calculation per client as well. A healthy total across the agency doesn't help a client whose own ready accounts fall short of their campaign plan.

Compare the price just below a tier change

There is one pricing detail worth checking closely when an order is near 250 mailboxes.

At the rates checked, 249 standard Google mailboxes cost more than 250 because the larger order reaches the lower Growth rate.

In that comparison, the extra mailbox reduces the initial subtotal by $97.20.

The saving comes from the lower rate applying across the order. FIRST20 then reduces that order's eligible charge.

This makes 250 worth considering when you already need roughly that many accounts. It gives you no reason to turn a genuine 100-mailbox requirement into a 250-mailbox purchase.

Also confirm how quantity is counted if the accounts belong to several clients. An agency-wide total and the quantity on an individual subscription may be different things. Get the applicable rate confirmed before using it in client quotes.

Choose Insured Infrastructure around the work it takes over

Insured Infrastructure is a service decision as well as a price decision.

For 100 mailboxes at the rates above, the standard option has a $350 subtotal and Insured has a $450 subtotal. With FIRST20 applied, the introductory figures become $280 and $360.

You're paying an additional $80 on the first eligible charge and $100 per full-price four-week charge at those unchanged rates.

Assess that difference against the responsibilities being covered.

Premium Inboxes lists active monitoring and priority support among the Insured features. Ask how those responsibilities work for your particular order, including what happens when an account needs attention.

Standard plans also advertise replacement inboxes. Choosing Insured solely because you assume standard accounts have no replacement provision would give you the wrong comparison.

If an experienced operator already manages the infrastructure, some additional services may overlap with that person's work. If the campaign team needs more help monitoring accounts, the extra service could be useful.

The decision should name the work you're paying the provider to own.

Match the billing commitment to the client commitment

FIRST20 also applied to the annual Google Workspace order checked with 100 mailboxes.

At $35 per mailbox per year, that order had a $3,500 annual mailbox subtotal. The code reduced the first annual subtotal by $700 to $2,800.

Compare annual and four-week options over equivalent periods. A lower first payment on the shorter option covers a shorter period of service.

For an agency, there is another question. How long has the client committed to the campaign?

If your commitment to the provider lasts longer than the client's commitment to you, account for who carries the cost of any unused months. An annual order can make sense when the workload and relationship are established. A shorter billing commitment can be easier to manage while those are still being proven.

Use the actual annual price and coupon calculation shown on the order. Adding two advertised percentage discounts together won't necessarily describe what you'll pay.

Get a separate answer for custom orders

The checkout reviewed directs orders of 2,500 or more mailboxes toward custom pricing.

For that size of purchase, ask for a quote that states the inbox quantity, provider, service scope, and billing commitment. Have the team identify whether FIRST20 applies and where the reduction appears.

Do the same if you are buying a separate management service alongside the mailboxes. A discount accepted by an inbox checkout doesn't establish the price of every other service on an agreement.

There is an operational reason to get this in writing. Your team needs to know what happens when the client adds mailboxes, reduces the order, or changes the level of support.

A quote you can map to those decisions is more useful than a headline percentage.

Buy for the campaign you can actually run

My experience with Premium Inboxes includes infrastructure handling 100,000 cold emails per month. For someone planning a similar volume, I'd start with total campaign traffic and the number of accounts ready to carry it.

Then choose the relevant quantity tier and decide how much infrastructure management your team needs.

At the checked rates, a 100-mailbox standard order saves $70 with FIRST20. A 250-mailbox Growth order saves $150. A 1,250-mailbox Enterprise order saves $700.

Each can be a sensible purchase for a different operation.

Choose the mailbox count and service scope first. Apply FIRST20 to the eligible order, then confirm the price and billing commitment you're agreeing to.