A Smartlead Alternative When Your Mailboxes Already Exist

Separating Mailbox Ownership From Campaign Sending

Most teams buy in the wrong order. They purchase domains, warm them, and only then discover that the campaign tool bundles its own mailboxes and charges for them again. If your mailboxes already work, that second purchase is wasted. What you actually need is a layer that connects to inboxes you control and writes and schedules the sequences.

The split matters because mailboxes are the slow part. Domains need time, DNS records need to settle, and reputation has to build. Campaign software is the fast part, and swapping it should not reset any of that work. Before you move, confirm one thing with the tool you are leaving: whether it lets you export SMTP and IMAP credentials for each mailbox. Read that vendor's current published terms rather than relying on memory.

• Collect SMTP and IMAP host, port, username and password for every mailbox you keep
• Confirm each mailbox still authenticates from a machine you control
• Note which mailboxes carry the most sending history and move those last
• Check your domains' SPF, DKIM and DMARC records are unchanged after the switch

If you want the wider decision framed around ownership rather than features, read our guide tobuying cold email software around mailboxes you already runbefore you compare plans.

Which Published Plans Accept Existing Mailboxes

On this site the monthly plans are priced by send volume and SMTP slots, not by mailboxes included. Starter at $18/month covers 2,000 emails and one SMTP slot. Growth at $38/month raises that to 10,000 emails, adds a reply inbox and API keys. Scale at $78/month reaches 50,000 emails with bulk campaigns and mailbox health checks.

If you would rather own the sending layer outright, LocalSMTP at $149 is a one-time purchase of five verified SMTP accounts with IMAP settings included. That suits a team that wants credentials in hand and no recurring seat for the relay. The two approaches are not exclusive. Some teams run this site's campaign layer over SMTP accounts they bought separately.

• Count the mailboxes you are keeping and match them to SMTP slots
• Estimate monthly send volume from your last three months, not your peak
• Decide whether you need a reply inbox inside the tool or will use each mailbox directly
• Check whether mailbox health reporting is required by whoever manages deliverability

Teams leaving a similar sending tool often follow the same steps, covered in oura comparable mailbox-first migrationwrite-up, which pairs well with this one.

What Carries Over and What You Rebuild

Mailboxes, domains and DNS records carry over untouched. Sending history stays with the mailbox, not with the tool, so reputation follows the inbox. What does not carry over is anything the old tool stored in its own format: sequence templates, lead lists, custom variables and campaign reports. Plan to rebuild sequences by hand or by export.

A worked example makes the cost concrete. A team keeping four mailboxes with a combined volume near 9,000 sends a month fits Growth at $38/month, which includes one SMTP slot per the published plan. If their volume sits closer to 40,000 sends, Scale at $78/month fits. Buying LocalSMTP at $149 alongside covers five verified SMTP accounts for the mailboxes themselves. Check slot counts against your mailbox total before you commit.

• Export lead lists as CSV while you still have access to the old account
• Rewrite sequences from a written outline rather than copying screenshots
• Record custom merge variables in a plain document first
• Keep the old tool active for a short overlap so nothing is lost mid-migration

Sequence templates are the hardest thing to rebuild, and ouranother migration path for sequence-heavy teamsexplains how teams handle that step without losing personalization.

The Cost of Moving Versus Staying Bundled

The arithmetic is simple once mailboxes are already paid for. If you keep five mailboxes and send around 45,000 emails a month, Scale at $78/month covers the campaign layer, and the mailboxes cost you whatever you already pay for them. A bundled tool would charge for the mailboxes again inside its own plan. That difference is the entire case for moving only the campaign layer.

Be honest about the trade. Running mailboxes yourself means you handle warm-up, rotation and reputation monitoring, or you buy those from someone. If you have no appetite for that work, a bundled product may be worth its price. This site sells the campaign layer and the SMTP accounts separately, which means the choice stays yours rather than being made for you.

• Add up what you pay today for mailboxes plus campaign sending separately
• Compare that to the published plan tier matching your real monthly volume
• Include the time cost of warm-up and rotation if you handle them yourself
• Recheck the figure after two months rather than assuming the estimate holds

Running the Switch Without Downtime

Move one mailbox first. Point it at the new tool, send a small batch, and watch replies land for a week. If the mailbox authenticates and replies arrive, move the next one. This staged approach keeps the majority of your volume on a working setup while you prove the new one. Do not move every mailbox on the same afternoon.

Pause campaigns on the old tool before switching each mailbox, so two systems never send from the same address at once. Update any tracking or CRM webhooks that reference the old tool's identifiers. When all mailboxes are moved and a full week has passed without delivery complaints, close the old account and keep the export files somewhere durable.

• Move one mailbox, then wait for a week of clean replies before the next
• Pause the old campaign for a mailbox before repointing it
• Retire the old account only after a full week with no delivery complaints
• Store the final lead export and sequence notes outside any tool

Published plans that accept mailboxes you already own

Monthly plans bill per month; lifetime deals are one-time prices, and code SALE20 takes 15% off lifetime deals at checkout.

Frequently asked questions