From: "=?koi8-r?B?4czFy9PBzsTS?=" <exchange@example.com>
To: user@example.com
Date: Sat, 02 Aug 2026 10:15:05 +0300
Subject: =?koi8-r?B?+sHQ0s/T?=
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test body
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dGVzdA==
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