Choosing a mailbox tier when you own one channel

Count the mailboxes your channel needs before you look at anything else. A marketing manager running one channel usually needs a sending identity per person or per stream, and that count, not the size of your contact list, decides which lifetime tier fits. Mailbox count is the number the tiers are sized by.

Your objection is fair: a second subscription should not repeat what already exists. LocalSMTP does not replace your CRM or your analytics. What it adds is mailboxes you can sign into over standard SMTP and IMAP, plus browser webmail for anyone who prefers a tab to a mail client, so sending sits with people rather than in one shared tool.

The comparison you are really running is between tiers on one published table. Three lifetime levels exist, sized by mailbox count, and the table on softwareprogrammer.app carries the figures. Read it against your headcount and your sending streams, and ignore any feature that does not change how many people can send from an address you control.

At the smallest level you get a handful of mailboxes, enough for a small team or a single channel split across a few sending identities. Standard SMTP and IMAP mean the same mailbox works in a mail client and in browser webmail. Warm-up and authentication checks sit alongside setup, which matters when a new address has no sending history.

Move up a level and the difference is count rather than capability. More mailboxes let you separate streams, give each person an identity of their own, or hold addresses in reserve while warm-up runs. Nothing in the brief suggests the feature set changes between levels, so treat the decision as arithmetic on how many addresses your channel needs at once.

At the top level the mailbox count is large enough for a department or several channels sharing one service. The same caveats apply at every level. Placement in the inbox is not promised, and extra services sit outside the tier price. Choose the level by counting addresses, not by assuming a bigger tier improves delivery.

Underneath the tier question sits a simpler one: who sends, and from which address. If two people share one mailbox, you have a coordination problem, not a tooling problem. If each stream needs its own identity, the mailbox count rises and so does the tier. Answer that first and the comparison gets short.

The second question is what you expect the mailbox to do. A mailbox carries your messages out. It does not supply the people you write to, and it does not tell you whether a message reached an inbox. Your contact list, your segmentation and your reporting stay where they already are, which is why this is an addition rather than a replacement.

The third question is cost beyond the tier. Anything outside the mailbox count is priced on its own, so map what your channel needs against what the tier includes before you commit. If your requirement is mostly mailboxes and basic sending, the lifetime structure is easy to justify against a recurring per-seat arrangement.

The next tier buys headroom. If your current count leaves one or two addresses spare, a new hire or a new stream pushes you over. Buying the next level up means you can add a sending identity without reopening the purchase, which matters when a channel is expected to grow through the year you agreed it.

It also buys separation. Distinct mailboxes per stream keep replies and reputation apart, so a problem with one stream does not sit on the same address as another. That separation is a working practice, not a promise about delivery, and no tier guarantees a place in the inbox after the authentication checks pass.

What it does not buy is recipients or extra services. A mailbox is not a contact list, and anything beyond the mailbox count carries its own price. So the honest test is whether the extra addresses will be used within a reasonable period. If not, stay where you are and revisit when the count is genuinely tight.