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The 220 response has mail.hprs.local, which is the local hostname, but not the public name for sending emai, e.g. firstname.lastname@example.org.
$ telnet ohprs.org 25 Trying 126.96.36.199... Connected to ohprs.org. Escape character is '^]'. 220 mail.hprs.local ESMTP Sendmail 8.14.9/8.14.9; Thu, 19 Feb 2015 22:34:10 -0500
The A and MX records are hosted at networksolutions.
$ host ohprs.org ohprs.org has address 188.8.131.52 ohprs.org mail is handled by 20 mail.ohprs.org. ohprs.org mail is handled by 10 webserver.ohprs.org.