icloud deleting ‘random’ emails

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I have sent myself SMTP emails from a website.  When the emails decline to deviation up on my formatting Parcel germaneness, i go to my iCloud parcel tab to bonanza out that Icloud has put the voice parcel in the trash.  I have no rules set up and per other suggestions I have free the boxes; Trust rummage parcel headers in messages, and Filter rummage parcel before applying my rules in the Rummage Parcel tab of Parcel preferences.  I am at a cost as to what to do next.  Not all emails get put in the trash.  It seems to be a accidental occurrence.