How do I find the MX records for my email provider?

Check the provider-specific guides on this page. Each major email provider publishes the exact MX record hostnames and priorities you need. You can also look up any domain's current MX records with our free MX Record Checker.

Do all email providers use the same MX records?

No. Every provider has different MX record hostnames and priority configurations. Google Workspace uses five MX records, Microsoft 365 uses one, and most others use two. You must use the exact values specified by your provider.

What if I'm switching email providers?

Replace your old MX records with your new provider's values and remove the old ones completely. Don't leave both sets in place — email will split unpredictably between them. Lower your TTL before making the change to speed up propagation.

Can I use MX records from two different providers at the same time?

Generally no. Having MX records for two providers means some email goes to one and some to the other based on priority and availability. This is almost never what you want. Use one provider's records at a time.

MX Records by Email Provider: Setup Guides and Record Values

Every email provider requires different MX records. Getting the wrong hostname or priority value means email won't reach your inbox.

This page is a quick-reference for the correct MX records across all major providers, with links to detailed setup guides. If you're setting up email for the first time or switching providers, start here.

For the broader context on how MX records work, see the Complete Guide to MX Records.

Quick Reference Table

Provider	MX Records	Primary Hostname	Type
Google Workspace	5	aspmx.l.google.com	Business
Microsoft 365	1	*.mail.protection.outlook.com	Business
Zoho Mail	3	mx.zoho.com	Business
ProtonMail	2	mail.protonmail.ch	Business/Personal
Fastmail	2	in1-smtp.messagingengine.com	Business/Personal
iCloud	2	mx01.mail.icloud.com	Personal
Yahoo Business	2	mx1.biz.mail.yahoo.com	Business
Amazon WorkMail	1	inbound-smtp.*.amazonaws.com	Business
Rackspace	2	mx1.emailsrvr.com	Business
Titan	2	mx1.titan.email	Business
Migadu	2	aspmx1.migadu.com	Business/Personal
MXroute	2	Account-specific	Business/Personal
IceWarp	2	mx1.icewarp.com	Business
Tuta	1	mail.tutanota.de	Business/Personal
Mailgun	2	mxa.mailgun.org	Transactional
SendGrid	1	mx.sendgrid.net	Transactional

Tenant-specific hostnames

Microsoft 365, Amazon WorkMail, and MXroute generate unique hostnames per account. You'll find yours in the provider's admin console. The guides below explain where to find it.

Business Email Providers

These are full email platforms for organisations: mailboxes, calendars, contacts, and collaboration tools.

Google Workspace

Google uses five MX records with a tiered priority structure for maximum redundancy:

Priority	Hostname
1	aspmx.l.google.com
5	alt1.aspmx.l.google.com
5	alt2.aspmx.l.google.com
10	alt3.aspmx.l.google.com
10	alt4.aspmx.l.google.com

All five records are required. Google load-balances across them automatically.

Full guide: Google Workspace MX Records

Microsoft 365

Microsoft uses a single tenant-specific MX record:

Priority	Hostname
0	yourdomain-com.mail.protection.outlook.com

Replace yourdomain-com with your actual domain (dots become dashes). Find the exact value in the Microsoft 365 admin center under Domains.

Full guide: Microsoft 365 MX Records

Zoho Mail

Zoho uses three MX records with regional variants depending on where your account is hosted:

Priority	Hostname (US)
10	mx.zoho.com
20	mx2.zoho.com
50	mx3.zoho.com

If your account is on a regional instance, use the matching domain: .eu, .in, .com.au, or .jp.

Full guide: Zoho Mail MX Records

Yahoo Business Email

Priority	Hostname
1	mx1.biz.mail.yahoo.com
5	mx5.biz.mail.yahoo.com

Full guide: Yahoo Business MX Records

Amazon WorkMail

Amazon uses a single region-specific MX record:

Priority	Hostname
10	inbound-smtp.[region].amazonaws.com

Replace [region] with your WorkMail region (e.g. us-east-1, us-west-2, eu-west-1).

Full guide: Amazon WorkMail MX Records

Rackspace Email

Priority	Hostname
10	mx1.emailsrvr.com
20	mx2.emailsrvr.com

Full guide: Rackspace MX Records

Titan Email

Priority	Hostname
10	mx1.titan.email
20	mx2.titan.email

Full guide: Titan MX Records

IceWarp

Priority	Hostname
10	mx1.icewarp.com
20	mx2.icewarp.com

For on-premise IceWarp installations, use your own mail server hostname instead.

Full guide: IceWarp MX Records

Privacy-Focused Providers

ProtonMail

Priority	Hostname
10	mail.protonmail.ch
20	mailsec.protonmail.ch

Full guide: ProtonMail MX Records

Tuta (Tutanota)

Priority	Hostname
10	mail.tutanota.de

Tuta uses a single MX record with no backup. Their infrastructure handles redundancy internally.

Full guide: Tuta MX Records

Independent and Developer-Friendly Providers

Fastmail

Priority	Hostname
10	in1-smtp.messagingengine.com
20	in2-smtp.messagingengine.com

Full guide: Fastmail MX Records

Migadu

Priority	Hostname
10	aspmx1.migadu.com
20	aspmx2.migadu.com

Full guide: Migadu MX Records

MXroute

Priority	Hostname
10	[your-server].mxrouting.net
20	[your-server-backup].mxrouting.net

MXroute assigns unique server hostnames per account. Check your welcome email or account panel for the exact values.

Full guide: MXroute MX Records

iCloud Custom Domain

Priority	Hostname
10	mx01.mail.icloud.com
20	mx02.mail.icloud.com

Available with iCloud+ subscriptions.

Full guide: iCloud Custom Domain MX Records

Transactional Email Services

These services are for sending application email (receipts, notifications, password resets). They're not full mailbox providers. You typically only point MX records here if you want to receive and process inbound email programmatically.

Mailgun

Priority	Hostname
10	mxa.mailgun.org
10	mxb.mailgun.org

Equal priorities for load balancing across both servers.

Full guide: Mailgun MX Records

SendGrid

Priority	Hostname
10	mx.sendgrid.net

Full guide: SendGrid MX Records

Switching Providers

When you migrate between email providers:

Lower your TTL to 300 seconds a day or two before the switch
Remove old MX records completely. Don't leave them alongside the new ones.
Add new MX records with the exact values from your new provider
Verify delivery by sending test emails from an external account
Raise TTL back to 3600 seconds once everything is confirmed working

Don't leave old and new MX records in place simultaneously. Email will split between providers unpredictably based on priority values and server availability.

For migration specifics, see MX Records After Domain Transfer. For step-by-step instructions on adding records at your DNS host, see How to Add MX Records.

Identify Your Current Provider

Not sure which email provider you're currently using? Run an MX lookup on your domain. The mail server hostnames reveal the provider. See Who is My Email Provider? for how to read the results.

Monitor Your MX Records

After configuring your provider's MX records, don't just set and forget. DNS changes, expired domains, and accidental edits can silently break email delivery.

References

RFC 5321: Simple Mail Transfer Protocol - Specifies SMTP delivery and MX record lookup procedures
RFC 1035: Domain Names - Implementation and Specification - Defines the DNS record format, including MX records
Google Workspace MX record values - Official Google MX setup documentation
Microsoft 365 DNS records - Official Microsoft 365 DNS configuration guide

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