Certain people not receiving my emails

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   pcossey@turlock.k12.ca.us
    host d232047b.ess.barracudanetworks.com [209.222.82.252]
    SMTP error from remote mail server after end of data:
    550 permanent failure for one or more recipients (pcossey@turlock.k12.ca.us:blocked)

Reporting-MTA: dns; bosmailout08.eigbox.net

Action: failed
Final-Recipient: rfc822; pcossey@turlock.k12.ca.us
Status: 5.0.0
Remote-MTA: dns; d232047b.ess.barracudanetworks.com
Remote-MTA: X-ip; [209.222.82.252]
X-Remote-MTA-smtp-greeting: X-str; 220 mail.ess.barracuda.com ESMTP (mx-inbound8-151.us-east-2a.ess.aws)
X-Remote-MTA-helo-response: X-str; 250-mx-inbound8-151.us-east-2a.ess.aws.cudaops.com Hello bosmailout08.eigbox.net [66.96.189.8], pleased to meet you
X-Exim-Diagnostic: X-str; SMTP error from remote mail server after end of data: 550 permanent failure for one or more recipients (pcossey@turlock.k12.ca.us:blocked)
Diagnostic-Code: smtp; 550 permanent failure for one or more recipients (pcossey@turlock.k12.ca.us:blocked)

Return-path: < venesa@colorzfacepainting.com>
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MIME-Version: 1.0
Date: Wed, 08 Feb 2023 12:34:55 -0800
From:  venesa@colorzfacepainting.com
To:  pcossey@turlock.k12.ca.us
Subject: Checking in
Message-ID: < a5db3825e2dcfc9eefcca10026071479@colorzfacepainting.com>
X-Sender:  venesa@colorzfacepainting.com
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Content-Type: multipart/alternative;
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X-EN-AuthUser:  venesa@colorzfacepainting.com
Sender:   venesa@colorzfacepainting.com
X-EN-Class: impinc