Code: regular_text: Received: from mail.duore.icu (unknown [185.244.24.188]) regular_text: by mx3.domain.com (Postfix) with ESMTP id F1B56DF1 regular_text: for <[email protected]>; Sat, 23 Mar 2019 09:31:39 -0600 (CST) regular_text: DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; s=dkim; d=duore.icu; regular_text: h=Date:From:To:Subject:MIME-Version:Content-Type:List-Unsubscribe:Message-ID; [email protected]; regular_text: bh=Veu6CEu+rmaRt3nvQBz+XPB+R38=; regular_text: b=iL+uUcn5FibetfAHmjVbivNRYZ6T1fH6b6BNMBvnfjPxLWryCfnRxnx2du4N1cl+3UcmrPILBI/8 regular_text: lCgh39iv07ZvFkGiyw2CEqYw+Fht9/9IxkODMlXT/MMz2CNuLV/KCZDlPXElLRPTedNHM/+SVSTe regular_text: 6OcCt+bOjLMLq1cgNVk= regular_text: DomainKey-Signature: a=rsa-sha1; c=nofws; q=dns; s=dkim; d=duore.icu; regular_text: b=rslgWyoF9FeKIPziU/qcY3DX5X/E5cV5x/r7XAgxUsD9heVLglfLijjSE7MwE7sireQh8Cq9M6lS regular_text: NK8YMP4VuFB/P/RmeXR1nC6elJpB+dC/xr1al0RLr0KRW5PzyAwMly5hkdXe9idKXnEEP08tmAKr regular_text: Xhu1tbMonY7yU/Vn1GM=; regular_text: Received: by mail.duore.icu id hip8lo0001ge for <[email protected]>; Sat, 23 Mar 2019 11:25:15 -0400 (envelope-from <[email protected]>) regular_text: Date: Sat, 23 Mar 2019 11:25:15 -0400 regular_text: From: LifeInsurance.net <[email protected]> regular_text: To: <[email protected]> regular_text: Subject: $1,000,000 Life Insurance Plans you can Afford regular_text: MIME-Version: 1.0 regular_text: Content-Type: multipart/alternative; regular_text: boundary="----=_Part_856_165377193.1553354702507" regular_text: List-Unsubscribe: <http://www.duore.icu/ad95F2Z395Pm8P913h11rBzvs2920X18Os4xHssvwfg5sIEGsi8JRInnmQd6t1Zix05CTcOY/noninterleaved-requires> regular_text: Message-ID: <[email protected]> Here is a sample of the header. Where should I begin to look?