MX record
Also called: Mail exchanger record
An MX (mail exchanger) record is the DNS entry that tells the world which servers receive email for a domain, in order of priority.
How it affects cold email
Your sending domain needs MX records so replies and bounce reports reach you. A domain that can send but not receive looks suspicious and loses every reply.
MX records of your recipients matter too: a domain with no mail server can’t receive email, so any address there is invalid.
How Inboxed handles it
- The domain checker confirms your domain has MX records and names the server that handles its mail.
- Email verification looks up each recipient domain’s MX records live; addresses on domains without a mail server are marked invalid and never sent to or charged.
- Inboxed can also use recipients’ MX records to prefer a sending mailbox on the same provider (Google to Google, Microsoft to Microsoft) when you turn that on for a campaign.
Related terms
Sources
Sources checked on 8 November 2026. Rules change, so check the source before you rely on a detail.
- Email sender guidelines · Google, Gmail Help
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