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    Multiple Received-SPF Headers Added To Emails Sent To A Group Email Address

    TITLE: Multiple Received-SPF Headers Added To Emails Sent To A Group Email Address PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE: Plesk Onyx Version 17.5.3 Update #20 CentOS Linux 7.3.1611 PROBLEM DESCRIPTION: After switching SPF checking mode from "Reject mail when SPF resolves to fail" to...
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