Move your transactional sending in stages, run both providers in parallel, and keep Mailjet for campaigns if you still want it there.
A staged move for transactional mail, with an honest note on what stays behind in Mailjet
List your domains, keys, templates, webhooks and suppressions.
Add MigoSMTP DNS records alongside the old ones.
Recreate templates and webhooks, import suppressions.
Shift traffic in stages and watch delivery.
Remove old records and keys once stable.
Terminology reflects the provider's documentation at the time of writing. Verify against current docs before publishing.
curl -X POST https://api.mailjet.com/v3.1/send \
-u "MJ_API_KEY:MJ_SECRET_KEY" \
-H "Content-Type: application/json" \
-d '{ "Messages": [{
"From": { "Email": "hello@yourdomain.com" },
"To": [{ "Email": "user@example.com" }],
"Subject": "Hello",
"HTMLPart": "<p>Hi there</p>" }] }'curl https://api.migosmtp.com/v1/send \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"from": "hello@yourdomain.com",
"to": "user@example.com",
"subject": "Hello",
"html": "<p>Hi there</p>"
}'Illustrative requests. See the API reference for the complete field list.
To move your sending from Mailjet to MigoSMTP, list your verified senders and domains, API key pairs, templates and event webhooks, then authenticate your domains with MigoSMTP while the Mailjet records stay in place. Create scoped API keys, recreate templates, point webhooks at your handler, and import your suppressions before the first send. Shift one stream at a time, starting with a small share of low-risk mail, and retire Mailjet keys once volume has held steady.
Mailjet is two products in one account: a sending service (SMTP relay and the Send API) and a set of marketing tools such as the campaign editor, segmentation and automations. Moving your sending does not move the marketing tools. Many teams keep Mailjet for campaigns and move only transactional mail, such as receipts, password resets and notifications, so decide that before you start.
On price, Mailjet lists a free plan with 6,000 emails a month and a cap of 200 a day, a Starter plan at $9 a month for 8,000 emails, and Essential at $19 for 15,000 (prices in US dollars, excluding VAT, as listed on mailjet.com on 15 October 2026). MigoSMTP lists $10 a month for 10,000 emails and $22 for 25,000. At small volumes the two are close, so the better test is your own volume and the features you actually use.
Receipts, resets and alerts are the easiest to move and the easiest to measure. Send a small share through MigoSMTP, compare bounces and complaints with Mailjet for a week, then raise the share.
If your marketing team builds campaigns in Mailjet's editor, leave that alone while you move product email. You can revisit it once sending is stable.
Mailjet signs requests with a public key and a private key. In MigoSMTP, create one key per application with only the permissions it needs, so a leaked key has a small blast radius.
Templates that use a Mailjet template ID need to be rebuilt in MigoSMTP with the same variables. Test each one with your real sample data before it goes live.
Mailjet's event webhooks report delivery, bounces, opens, clicks and unsubscribes. Map the events your code actually reads, update the endpoint, and check signatures in the new payload.
Export bounced, blocked and unsubscribed addresses from Mailjet and import them before sending, so you do not mail addresses you already know are bad.
Use the free SPF, DKIM and DMARC checker to confirm that your domain authorises Mailjet and MigoSMTP at the same time before you move any traffic.
If you move to a dedicated IP, the IP warmup calculator gives you a day-by-day volume ramp so reputation builds steadily.
While both providers run, the bounce code lookup turns raw SMTP responses into plain explanations and a suggested fix.
Send our team your list of streams and rough volumes and ask for a review of the order in which to move them. This is offered on request.
The checker, calculator and lookup are free tools on this site. The cutover review is a conversation with our team, and you decide every change in your own account.
Write down every application that sends through Mailjet, including support tools and billing systems. Forgotten integrations are the most common surprise.
Publish SPF and DKIM for MigoSMTP while keeping Mailjet's records, so both can send for your domain during the overlap.
Begin with mail that people expect and open. Strong early engagement helps a new sending source build trust.
A rising complaint rate at one mailbox provider is the earliest sign something is wrong. Check it daily during the move.
Pick a quiet week. If something needs fixing, you want time to fix it without an angry queue of customers.
Remove Mailjet keys first, wait a week, then remove old DNS records. Keep a record of what you removed and when.
Moving from Mailjet? Our team can review your senders and templates before you start.
Inventory senders, domains, API keys, templates and webhooks. Authenticate your domains with MigoSMTP alongside Mailjet, create scoped keys, recreate templates, point webhooks at your handler, and import suppressions. Move one stream at a time and retire Mailjet once the new setup has run cleanly for a few weeks.
Moving sending does not touch them. Your campaigns, contacts and automations stay in Mailjet until you decide otherwise. If you only need transactional sending from MigoSMTP, you can keep Mailjet for marketing.
It depends on your volume and features. As listed on 15 October 2026, Mailjet Starter is $9 a month for 8,000 emails and Essential is $19 for 15,000, while MigoSMTP is $10 for 10,000 and $22 for 25,000. Compare both at your own volume on their pricing pages, because plans and prices change.
If most of your value comes from its campaign editor, segmentation and automations, and your transactional volume is small, staying is reasonable. A move makes more sense when you want dedicated transactional infrastructure, INR or EUR billing, or you are growing past what your current plan gives you.
Yes. You can use the SMTP relay on port 587 with STARTTLS or port 465 with implicit TLS, or the REST API. If your application already speaks SMTP, switching is often only a host, a username and a password.
If you move from Mailjet's shared pool to a dedicated IP, yes. A dedicated IP has no history, so raise volume in steps. The warmup calculator gives a schedule.
Yes, and you should. Authenticate both, send a small share through MigoSMTP first, and increase gradually.
From Mailjet's public pricing page, read on 15 October 2026. Check the live page before you decide, because providers change plans.
Tell us about your domains, volume and setup and we will help you plan a safe, staged cutover.
Create an account, add your domain and send your first email.