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From: John Levine <johnl@taugh.com>
Newsgroups: comp.mail.sendmail
Subject: Re: Sendmail on FreeBSD 14, gmail problem
Date: Mon, 15 Apr 2024 18:31:17 -0000 (UTC)
Organization: Taughannock Networks
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Keywords: gmail authentication freebsd sendmail
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According to  <bp@www.zefox.net>:
>I've got a FreeBSD 14 host running sendmail from packages that works perfectly
>otherwise but can't be persuaded to communicate with gmail:
>(reason: 550-5.7.26 This mail has been blocked because the sender is unauthenticated.)

Yup, that's a problem.

>Is there a FreeBSD expert out there who can tell me what I've missed?

Not until you tell us what the domain name is so we can tell you what
you're doing wrong.  Most likely your sendmail setup is fine, but your
SPF and DKIM configations are missing or wrong.

-- 
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