LocalSMTP for contractors who deliver verified contact lists

Picture the working week: you pull a list, check every row, and send outreach from your own mailboxes before you hand the file to a client. The payment goes towards the sending side of that week, in the form of standard SMTP and IMAP mailboxes you configure yourself, plus browser webmail for anyone on your team who prefers a tab to a mail client.

Authentication and warm-up checks sit alongside setup, which matters when a client asks how the sending domain was prepared. Those checks give you something to describe in your own handover notes. They do not replace the verification work you do on the list itself, and they do not give you any recipients to write to.

Lifetime tiers are sized by mailbox count rather than by send volume, so your budget maps to how many separate sending identities you need across client accounts. That is a different unit from list size, and it is worth saying so plainly when you quote a client for a delivery.

Starter covers five mailboxes. For a contractor running one client campaign at a time, that is enough to keep each sending identity separate without mixing domains. You still supply every address yourself, and the tier supplies nothing in the way of contacts or list data.

Studio raises the count to fifteen mailboxes. That suits a contractor juggling several client accounts in the same month, where each account needs its own mailbox and its own warm-up history. Warm-up and authentication checks travel with the mailboxes, so the preparation work is repeatable across accounts rather than rebuilt for each one.

Floor gives you fifty mailboxes. At that size you are likely running a small operation with several people sending on behalf of different clients, and the webmail access becomes practical for anyone who does not want a desktop client. The tiers are published on softwareprogrammer.app, so check the table there before you commit.

The objection you raised is the right one: a client who finds an unverifiable row will question the whole file. No mailbox service fixes that, and LocalSMTP does not claim to. What it gives you is a clean sending identity per client, so the message a client receives can be traced back to a mailbox you control and configured.

Keep the two jobs apart in your own workflow. Sourcing and verifying rows stays with you, and the mailbox carries the outreach once a row is confirmed. If a client asks for the source of a contact, the answer comes from your research notes, not from the tier you bought.

Placement is the other honest caveat. Warm-up and authentication checks improve the conditions for delivery, but a message can still be filtered after it leaves. Tell clients that in the contract rather than promising an inbox, and the relationship survives the occasional miss.

Ask how many client accounts you will send for in the next few months, not how many messages you plan to send. Mailbox count is the unit that moves you between Starter, Studio and Floor. A contractor with two steady accounts may never need to leave the five-mailbox tier.

Move up when a new client would otherwise share a mailbox with an existing one. Separation between accounts is the reason to pay for more mailboxes, and it is easier to justify to a client than a volume figure. Warm-up history per mailbox also becomes cleaner to explain when each account has its own.

Before you upgrade, read the published tier table and confirm what sits outside it. Services beyond the mailbox count are priced on their own, so the total you pay may exceed the tier figure. Budget for those additions separately in your client quotes.