MX records: salesforce.com
MX records (Mail Exchange) specify which servers accept email for a domain. The priority value determines delivery order.
MX records define where mail is delivered, while SPF, DKIM and DMARC authenticate the sending source and protect against spoofing. Together they form the basis for reliable, secure email delivery.
Email routing for salesforce.com
This page covers inbound email routing for salesforce.com, a domain whose registrable label is salesforce under .com.
A sending mail server resolves the MX records of salesforce.com, picks the exchanger with the lowest priority value, resolves that hostname to an address and connects over SMTP.
Lower priority numbers are tried first and equal values share load. A domain without MX records cannot receive mail through standard SMTP routing.
Authentication policy for salesforce.com lives in TXT records: SPF at salesforce.com, DKIM keys under selector._domainkey.salesforce.com, and the DMARC policy at _dmarc.salesforce.com.
Investigation path: MX host → its A record → the IP address → the autonomous system announcing it.
MX hosts, priorities and policy strings are live DNS values, loaded below.