When one subscribes to a bug and receives the "Please confirm
subscription" message (in the cases where bug 1071576 does not
occur), this message contains data like

b'Return-Path: <1@buxtehude.debian.org>\nX-Original-To: lists-bugs=1057695-subscribe@bendel.debian.org\nDelivered-To: lists-bugs=1057695-subscribe@bendel.debian.org\nReceived: from localhost (localhost [127.0.0.1])\n\tby bendel.debian.org (Postfix) with ESMTP id 1822F2053C\n\tfor <lists-bugs=1057695-subscribe@bendel.debian.org>; Tue,  2 Jul 2024 08:24:08 +0000 (UTC)\nX-Virus-Scanned: Debian amavisd-new at bendel.debian.org\nX-Spam-Flag: NO\nX-Spam-Score: 2.062\nX-Spam-Level: **\nX-Spam-Status: No, score=2.062 tagged_above=-10000 required=6.31\n\ttests=[BAYES_00=-1.9, EMPTY_MESSAGE=2.32,\n\tHEADER_FROM_DIFFERENT_DOMAINS=0.249, PYZOR_CHECK=1.392,\n\tTVD_SPACE_RATIO=0.001] autolearn=no autolearn_force=no\nReceived: from bendel.debian.org ([127.0.0.1])\n\tby localhost (lists.debian.org [127.0.0.1]) (amavisd-new, port 2525)\n\twith ESMTP id izZTpvMwwzuN\n\tfor <lists-bugs=1057695-subscribe@bendel.debian.org>;\n\tTue,  2 Jul 2024 08:24:05 +0000 (UTC)\nReceived: from buxtehude.debian.org (b

The characters \n and \t should appear as newlines and tabs.