MX Record Support

MX Record Support

For each destination station contacted by means of an IPC-type mailer (P=[IPC] in the mailer definition line), sendmail queries the DNS database for MX records associated with the destination station. If the MX query succeeds, mail will be routed through the appropriate exchanger station found among the returned MX records as described in RFC 974 and required by RFC 1123.

The result is that this version of sendmail and previous versions may use different methods to route mail to stations for which MX records are available. See Appendix B, "IRIX sendmail Reference," for information regarding mailer definitions.

With the advent of MX records, you may want to edit your sendmail.cf file to remove previously required static routes.