Well, it appears that Kathy has gotten dinged for being a spammer.

The following is the key piece from the email header excerpt below:
3.6 RCVD_IN_SBL_CSS RBL: Received via a relay in Spamhaus SBL-CSS
* [104.244.227.155 listed in zen.spamhaus.org]

This email landed in our spam log file.
So, she should either send from a different email address or your club will need to increase your Spam Assassin threshold to let her send from this email address. (I recommend the former.)
Code:
X-Spam-Status: Yes, score=5.3 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,
FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,
RCVD_IN_SBL_CSS,RCVD_IN_SORBS_WEB,SPF_PASS autolearn=no autolearn_force=no
version=3.4.0
X-Spam-Report:
* 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider
* (kathydyke4[at]gmail.com)
* 3.6 RCVD_IN_SBL_CSS RBL: Received via a relay in Spamhaus SBL-CSS
* [104.244.227.155 listed in zen.spamhaus.org]
* 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server
* [104.244.227.155 listed in dnsbl.sorbs.net]
* -0.0 SPF_PASS SPF: sender matches SPF record
* 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in
* digit (kathydyke4[at]gmail.com)
* -0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3)
* [209.85.213.50 listed in wl.mailspike.net]
* -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no
* trust
* [209.85.213.50 listed in list.dnswl.org]
* -0.0 RCVD_IN_MSPIKE_WL Mailspike good senders
X-Spam-Level: *****
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
toastmastersclubs.org
Content-Transfer-Encoding: 8bit
X-MIME-Autoconverted: from quoted-printable to 8bit by toastmastersclubs.org id w0GD6WUl024311