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Moving hosts without losing email

Most migration problems are not about the website. They are about email that quietly stops arriving after the switch.

Sep 22, 2026 3 min read By the BearStack team

A host move touches three things: the website files, the database and the DNS records that tell the internet where to find them. Email lives in those DNS records too.

01 / Inventory

Write down everything the domain does

Before anything moves, list every service that uses your domain: the website, mailboxes, forwarding addresses, a booking tool, a newsletter platform. Each one usually has its own DNS record, and each one can break.

02 and 03 / Backup and DNS plan

The records to copy before you switch

Take a full backup of files and database, then export the current DNS zone. These are the records that matter most for email.

Record What it does If it is missing
MXSays which server receives your emailIncoming email stops arriving
SPFLists who is allowed to send as your domainYour emails land in spam
DKIMSigns outgoing email so it can be verifiedMail is rejected or flagged
DMARCTells receivers what to do with failed checksSpoofed mail is harder to stop
A / CNAMEPoint the domain and subdomains to serversSite or tools stop loading

04 / The switch

Plan for the in-between hours

After DNS changes, some visitors reach the new server and some still reach the old one. This can last up to 48 hours. Keep the old hosting live until the window closes.

Prepare
Switch window · up to 48h
Close old host
Lowering the record TTL a day ahead shortens the window. TTL is how long servers cache an answer.

05 / Post-move tests

Test it like a customer would

Test 01 Send email in and out From an outside address, to and from every mailbox.
Test 02 Submit every form Contact, booking and quote forms reach the right inbox.
Test 03 Place a test order Through to payment and the confirmation email.
Test 04 Check the padlock The SSL certificate is valid on every version of the address.

Planning a host move?

We start with an inventory and a DNS plan, agree the switch time with you, then test email, forms and checkout after the move.

Plan a migration