Returned mail: see transcript for details

The original message was received at Wed, 12 Mar 2025 20:05:40 -0400 from m0174721.ppops.net [127.0.0.1]
----- The following addresses had permanent fatal errors ----- laura.hines@nccsk12.org (reason: 550-5.1.1 The email account that you tried to reach does not exist. Please try)
----- Transcript of session follows ----- ... while talking to aspmx.l.google.com.:
DATA
<<< 550-5.1.1 The email account that you tried to reach does not exist. Please try <<< 550-5.1.1 double-checking the recipient's email address for typos or <<< 550-5.1.1 unnecessary spaces. For more information, go to <<< 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser e9e14a558f8ab-3d47a64e2cbsi1766605ab.22 - gsmtp 550 5.1.1 laura.hines@nccsk12.org... User unknown <<< 503-5.5.1 RCPT first. A mail transaction protocol command was issued out of <<< 503-5.5.1 sequence. For more information, go to <<< 503-5.5.1 https://support.google.com/a/answer/3221692 and review RFC 5321 <<< 503 5.5.1 specifications. e9e14a558f8ab-3d47a64e2cbsi1766605ab.22 - gsmtp
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