Submit by running sendmail submits to 127.0.0.1 ?

I was looking at the logs and saw this when I sent myself a test
message by running sendmail and typing the message:
Mar  9 21:21:36 xxx sendmail[58329]: 42A2LKNa058329: from=jrl396, size=57, class=0, nrcpts=1, msgid=<202403100221.42A2LKNa058329@xxx>, relay=jrl396@localhost
Mar  9 21:21:36 xxx sendmail[58608]: 42A2Lah7058608: from=<jrl396@xxx>, size=386, class=0, nrcpts=1, msgid=<202403100221.42A2LKNa058329@xxx>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
Mar  9 21:21:36 xxx sendmail[58329]: 42A2LKNa058329: to=johnl@iecc.com, ctladdr=jrl396 (14132/14132), delay=00:00:16, xdelay=00:00:00, mailer=relay, pri=30057, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (42A2Lah7058608 Message accepted for delivery)
It looks like sendmail submitted the message by ESMTP to 127.0.0.1.
So to check that, I telnet'ed to 127.0.0.1 and sending it directly:
Mar  9 21:25:12 xxx sendmail[63488]: 42A2OcIV063488: from=<jrl396@xxx>, size=58, class=0, nrcpts=1, msgid=<202403100224.42A2OcIV063488@xxx>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
Mar  9 21:25:12 xxx sendmail[64171]: STARTTLS=client, relay=mail.xxx., version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-AES256-GCM-SHA384, bits=256/256
Yup, that worked fine.
Submitting to 127.0.0.1 rather than running sendmail will always be
faster since it's doing less work, right?
--
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly