by Esma Calis · Last updated: 2026-06-05

Switching from Sender to Mailsoftly: The Complete Migration Guide

Switching from Sender to Mailsoftly takes most teams a few hours, not days. You export your contacts, segments, and templates from Sender as CSV files, hand them to Mailsoftly’s free migration team, and they rebuild your lists, automations, and sender authentication for you. No subscribers lost, no sending downtime.

The friction usually is not the move itself. It is the worry: will my automations break, will my deliverability drop, will I be left alone with a help-center article? This guide walks through exactly what transfers, the step-by-step process, and what to check in your first week so the switch feels boring in the best possible way.

Comparing options? See our full roundup of the best email marketing services for the complete picture.

Quick context: Mailsoftly offers transparent pricing, free hands-on migration, and human support. 500 contacts and 2,000 emails per month, no credit card.
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Why Are Teams Leaving Sender?

Most teams leave Sender for three reasons: cost that climbs as the list grows, an interface that gets clunky with serious automation, and support that feels thin when something urgent breaks. None of these are dealbreakers on day one. They become friction as your program matures.

Cost at scale. Sender prices by a mix of subscribers and monthly emails, and the jump between tiers can feel steep once you pass the free band. You can confirm current numbers on the official Sender pricing page, but the common complaint is predictability: a seasonal send spike or a list import can push you into a higher bracket faster than expected.

Complexity and support gaps. As your automations grow, building and debugging flows in a lighter-weight tool gets tedious, and self-serve help centers only go so far when a campaign is stuck. Email still drives some of the highest returns in marketing, with HubSpot reporting strong ROI benchmarks in its marketing statistics roundup, so the cost of a broken send or a missed automation is real revenue, not a minor annoyance.

Read enough? Try Mailsoftly free with 500 contacts and 2,000 emails per month, no credit card.Start free with Mailsoftly →

What Can You Bring With You From Sender?

Almost everything that matters comes with you. Your contacts, segments, subscription status, email templates, and the logic behind your automations all transfer. The only things you rebuild rather than copy are platform-specific settings like API keys and your sending domain authentication, which Mailsoftly’s team sets up for you during migration.

• Contacts and custom fields. Names, emails, tags, and any custom attributes export cleanly as CSV and map directly into Mailsoftly.
• Segments and lists. Your list structure and segment definitions carry over so you keep sending to the right people.
• Subscription status. Subscribed, unsubscribed, and bounced states transfer, which protects your list hygiene and your sender reputation.
• Email templates. Existing designs are imported or rebuilt in the Mailsoftly editor so your brand stays consistent.
• Automation logic. Triggers, conditions, and steps are recreated flow by flow, with the team mapping each one to a Mailsoftly equivalent.

The one rule worth respecting: bring your unsubscribe and suppression data with you. Re-mailing people who already opted out is the fastest way to damage deliverability, which is why preserving subscription status is a core part of a clean migration.

How Do You Migrate From Sender to Mailsoftly?

Migration is four steps: export from Sender, import to Mailsoftly, verify deliverability, and rebuild your automations. You can do it yourself, but Mailsoftly’s free hands-on migration means a specialist handles the heavy lifting and you simply review the result before going live.

Step 1: Export your data from Sender

In your Sender account, export your subscribers as a CSV file, including custom fields and subscription status. Export each list or segment separately so the structure is easy to rebuild. Save copies of your active automations and template designs as reference. This is the “sender export contacts” step, and getting clean files here makes everything downstream faster.

Step 2: Import your contacts into Mailsoftly

Upload your CSV files into Mailsoftly and map each column to the matching field. With free hands-on migration, you hand the exports to the team and they do the mapping, deduplication, and segment setup for you. Suppressed and unsubscribed contacts are preserved so you never accidentally re-engage someone who opted out.

Step 3: Verify deliverability and authentication

Before your first send, set up SPF, DKIM, and DMARC records for your sending domain. Proper authentication is the single biggest factor in landing in the inbox, and Litmus covers why in its guidance on email deliverability best practices. Mailsoftly’s team walks you through the DNS records and confirms everything passes before you send to your full list.

Step 4: Rebuild your automations

Recreate your welcome series, nurture flows, and triggered campaigns in Mailsoftly. Because automation logic does not export as a file between platforms, this is where hands-on help saves the most time: the team maps each Sender trigger and condition to its Mailsoftly equivalent, then you test each flow with a sample contact before switching it on.

Sender vs Mailsoftly: How Do They Compare?

The core difference is the support model and pricing clarity. Mailsoftly prices by contacts with a transparent ladder and includes free migration plus human support; Sender uses volume-based tiers and ticket-style help. The table below summarizes the comparison (Mailsoftly pricing as of 2026-04-15).

On the Mailsoftly side, the paid ladder is straightforward: Basic is $49 per month monthly or $39 per month annual for 5,000 contacts and 40,000 emails per month, Business is $99 per month monthly or $79 per month annual for 15,000 contacts and 150,000 emails per month, and Premium is $199 per month monthly or $159 per month annual for 30,000 contacts and 300,000 emails per month. Unlimited needs move to custom Enterprise pricing. You can review the full breakdown on the Mailsoftly pricing page.

The practical takeaway: if your bills feel unpredictable on Sender because send volume nudges you up a tier, contact-based pricing is easier to forecast. And if you have ever waited on a ticket while a campaign sat broken, a migration handled by a person changes the experience entirely.

What Should You Do in Your First Week After Switching?

In week one, focus on trust signals: warm up your sending, confirm authentication is passing, and watch engagement on your first few campaigns. A clean start protects the reputation you spent years building and tells inbox providers you are a legitimate sender on your new platform.

• Send a small first campaign. Start with your most engaged segment rather than the whole list, so early opens and clicks are strong.
• Confirm authentication is live. Verify SPF, DKIM, and DMARC are passing on real sends, not just in setup.
• Watch bounces and spam complaints. A clean migration keeps these low; a spike means a list-hygiene issue to fix early.
• Test one automation end to end. Run a real contact through your welcome flow and confirm every step fires.
• Keep Sender open briefly. Leave the old account live for a week as a fallback reference before you close it.

By the end of the week, you should see engagement matching or beating your Sender baseline. If anything looks off, Mailsoftly’s support team helps you diagnose it rather than pointing you at a help article.

For the broader landscape, see our full comparison of best email marketing services covering every major platform.

Frequently Asked Questions

How long does migrating from Sender take?

Most teams complete the switch in a few hours of active work. Exporting from Sender and importing contacts is quick; rebuilding automations takes the most time and depends on how many flows you run. With Mailsoftly’s free hands-on migration, the team does the bulk of the work and you simply review, so your own time investment is small.

Will I lose my contacts or automations?

No. Your contacts, custom fields, segments, and subscription status transfer through CSV export and import with nothing lost. Automations do not move as a file between platforms, so they are rebuilt step by step, but the migration team recreates each flow and you test it before going live. Your old Sender account keeps running until you are ready.

Is there a cost to switch?

No. The migration itself is free, including the hands-on help. You can start on the free plan with 500 contacts and 2,000 emails per month with no credit card, and only move to a paid tier when your list outgrows it. There is no migration fee and no setup charge.

Will my deliverability drop after switching?

It should not, as long as authentication is set up and you preserve subscription status. Mailsoftly configures SPF, DKIM, and DMARC for your domain and confirms they pass before your first full send. Starting with your most engaged segment and watching bounce and complaint rates in week one keeps your reputation strong on the new platform.

Start your free Sender migration. We do the heavy lifting.Start free with Mailsoftly →
500 contacts, 2,000 emails per month. Free hands-on migration. No credit card.

Esma Calis

Email Marketing Specialist at Mailsoftly

Esma is an Email Marketing Specialist at Mailsoftly who focuses on design best practices, newsletter strategy, and helping brands build stronger relationships with their subscribers through compelling email content.