SESC is configured so that there is a moderator that receives submissions from users. When a user submits an email it is removed from the user's spam submission folder. However it does not appear in the moderator's spam receipt folder but rather it appears in the Junk Email folder.
See the following article for details: Overview of the Junk E-mail Filter.
The following is an example:
The Outlook Junk Email Filter is acting on new messages that appear for the moderator. Since the email is spam the Outlook Junk Email Filter is moving it to the Junk Email folder.
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Turn off the Outlook Junk Email Filter. See the following article for details: How to Disable Outlook’s Junk E-mail Filter.