Problem sending jar file to Windows user

[norm]

First: I attached /home/norm/lib/Jar/chart.jar to a draft and then I did
an 's' to whatNow, I got an error message from whatNow. I am very sorry
that I didn't record and don't remember anything about that message.

Second: I copied /home/norm/lib/Jar/chart.jar to /tmp/,chart.zip and attached

This time whatNow accepted an 's'.  But then I got the an error Email, which
I am attaching to this message.
    Norman Shapiro

--- Begin Message --- Subject: Delivery Status Notification (Failure) Date: Mon, 05 Jul 2021 10:34:14 -0700 (PDT)

Message blocked

Your message to csfuhrer@verizon.net has been blocked. See technical details below for more information.

The response from the remote server was:

554 Message not allowed - [299]

Reporting-MTA: dns; googlemail.com
Received-From-MTA: dns; norm@dad.org
Arrival-Date: Mon, 05 Jul 2021 10:34:08 -0700 (PDT)
X-Original-Message-ID: <60e34290.1c69fb81.e41b0.52a7@mx.google.com>

Final-Recipient: rfc822; csfuhrer@verizon.net
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx-aol.mail.gm0.yahoodns.net. (67.195.204.75, the server for
 the domain verizon.net.)
Diagnostic-Code: smtp; 554 Message not allowed - [299]
Last-Attempt-Date: Mon, 05 Jul 2021 10:34:14 -0700 (PDT)

--- Begin Message --- Subject: ,chart.zip Date: Mon, 05 Jul 2021 10:34:07 -0700

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--- End Message ---

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