Glossary
Glossary1 min read
MX Record
An MX record tells other servers where to deliver mail for your domain. It governs where replies to your cold email land.
RT
RepMail Team
Product & Engineering · July 17, 2026 · 1 min read
An MX (Mail Exchange) record is a DNS entry that tells other mail servers which servers receive email for your domain, in priority order.
MX records do not affect outbound sending directly, but a domain with no MX cannot receive the replies your cold email is trying to earn. Every sending domain that expects responses needs valid MX records.
See the full guide: Related: DNS records for email.
Resources in this guide
MX in brief
Reference| Property | Value |
|---|---|
| Type | DNS MX |
| Purpose | Route inbound mail |
| Needed for | Receiving replies |
mx
dns
infrastructure
glossary
Frequently asked questions
Does an MX record affect deliverability?
Not outbound delivery directly, but without MX records your domain cannot receive replies, which defeats the purpose of cold outreach.
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