@
amrnxcdt #4 这个应该是无效的选项。因为测试同一个域名，第一封被拦截，第二封可以，第三封又被拦截的情况。
@
Tianao #5 应该是 outlook 的拦截器问题，因为 boc 这个地址寄出的邮件有过成功转发到 outlook 的例子，但是又不是每封都会拦截/放行。
这个是 yandex 的邮件头：
````
Received: from
postback17a.mail.yandex.net (
postback17a.mail.yandex.net [2a02:6b8:c0e:500:1:45:d181:da17])
by
fbebzsja7lz3ffco.vla.yp-c.yandex.net (notsolitesrv/Yandex) with LMTPS id E23UrH2hKvK0-4qf4qQ7g
for <xxx@domain.com>; Thu, 10 Jul 2025 14:00:33 +0300
Received: from
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net (
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net [IPv6:2a02:6b8:c1f:5e89:0:640:7435:0])
by
postback17a.mail.yandex.net (Yandex) with ESMTPS id 14A9B609E9
for <xxx@domain.com>; Thu, 10 Jul 2025 14:00:33 +0300 (MSK)
Received: from
bocmg.boc.cn (
mx4.bankofchina.com [219.141.191.6])
by
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net (mxfront/Yandex) with ESMTPS id Q0hSgYAFH4Y0-9VTC7VGY;
Thu, 10 Jul 2025 14:00:29 +0300
X-Yandex-Fwd: 1
Authentication-Results:
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net; spf=pass (
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net: domain of
bankofchina.com designates 219.141.191.6 as permitted sender, rule=[ip4:219.141.191.6]) smtp.mail=boczhangdan@bankofchina.com; dkim=pass header.i=@bankofchina.com
X-Yandex-Spam: 1
Received: from
bocmg.boc.cn (unknown [127.0.0.1])
by IMSVA (Postfix) with ESMTP id 64E5063CDE
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=
bankofchina.com;
s=mail2; t=1752145225;
bh=a2B0ff5lOgIxI7T8UYsXxhdCvQ/vyH5c+CBe67nccIA=; h=From;
b=PcUZZainFM9LcGziMNdrB7LKhRXym9d1g1EraTZcrwwQCnhQtR1lSvldAJquu45Lt
eBOazTwW66Hsawq8SWwJHaUz2jLkKeGONbNzWLQ0zChPaIWjLum2/XVI6r1IOg/vzA
8283fVApJkRZk1P1ZdwdsYgSM3/AG/xQvVWmjcF9mxDuWSXyfMUL2Vj2L804YDokuA
M813pU5HypoolQjaqfb6PO+tP48SeNxWLkNoN8Npr0GZp0SRLf8xTfn7zxPqwr3w6M
afu56ZxPx1s1LAHCC3W+atDlaYzlz/vMNZDWheHkDFC9tQl3f819HTw/KpHDqADMVF
m8tzXdIvEuq3A==
Received: from
bocmg.boc.cn (unknown [127.0.0.1])
by IMSVA (Postfix) with ESMTP id 4908363CDC
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
Received: from P1BCSPPL01 (unknown [21.124.190.66])
by
bocmg.boc.cn (Postfix) with ESMTP
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
Message-ID: <2069778417.1752145225248.JavaMail.bcsp@P1BCSPPL01>
Date: Thu, 10 Jul 2025 19:00:25 +0800 (CST)
From: boczhangdan@bankofchina.com
To: xxx@domain.com
Subject: =?GBK?B?1tC5+tL40NDQxdPDv6i159fT1cu1pQ==?=
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_23425685_670355975.1752145225248"
Return-Path: boczhangdan@bankofchina.com
X-Yandex-Forward: e8261cefa706a7538911b4c26e23e60d
````
这个是成功转发到 outlook 时候的邮件头：
````
Received: from
TYCPR01MB6495.jpnprd01.prod.outlook.com (2603:1096:400:92::11)
by
TYYPR01MB14050.jpnprd01.prod.outlook.com with HTTPS; Thu, 10 Jul 2025
11:00:41 +0000
Received: from
BY3PR04CA0001.namprd04.prod.outlook.com (2603:10b6:a03:217::6)
by
TYCPR01MB6495.jpnprd01.prod.outlook.com (2603:1096:400:92::11) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8901.23; Thu, 10 Jul
2025 11:00:38 +0000
Received: from
CO1PEPF000075EF.namprd03.prod.outlook.com (2603:10b6:a03:217:cafe::91) by
BY3PR04CA0001.outlook.office365.com (2603:10b6:a03:217::6) with Microsoft SMTP Server (version=TLS1_3,
cipher=TLS_AES_256_GCM_SHA384) id 15.20.8922.22 via Frontend Transport; Thu,
10 Jul 2025 11:00:37 +0000
Authentication-Results: spf=neutral (sender IP is 178.154.239.84)
smtp.mailfrom=
domain.com; dkim=timeout (key query timeout)
header.d=
bankofchina.com;dmarc=temperror action=none
header.from=
bankofchina.com;
Received-SPF: Neutral (
protection.outlook.com: 178.154.239.84 is neither
permitted nor denied by domain of
domain.com)
Received: from
forward101a.mail.yandex.net (178.154.239.84) by
CO1PEPF000075EF.mail.protection.outlook.com (10.167.249.38) with Microsoft
SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8922.22
via Frontend Transport; Thu, 10 Jul 2025 11:00:35 +0000
X-IncomingTopHeaderMarker: OriginalChecksum:41119ADA848909DB5DEC2FEFE2A3B4C3041EE1FFCA6902937C377AD2AB79B743;UpperCasedChecksum:CC8ED058EE93780C6EDA8658CF795D05F07CE7CB038650B3DB1C56BBEC83BC9D;SizeAsReceived:2875;Count:19
Received: from
mail-nwsmtp-mxback-production-main-47.vla.yp-c.yandex.net (
mail-nwsmtp-mxback-production-main-47.vla.yp-c.yandex.net [IPv6:2a02:6b8:c2d:3326:0:640:3348:0])
by
forward101a.mail.yandex.net (Yandex) with ESMTPS id 1502E60EDA
for <nimmo2016777888@outlook.com>; Thu, 10 Jul 2025 14:00:34 +0300 (MSK)
Received: from 2a02:6b8:c2d:2426:0:640:15f1:0 (2a02:6b8:c2d:2426:0:640:15f1:0 [2a02:6b8:c2d:2426:0:640:15f1:0])
by
mail-nwsmtp-mxback-production-main-47.vla.yp-c.yandex.net (mxback/Yandex) with HTTPS id H0hvgF4MYCg0-mNWsssmC;
Thu, 10 Jul 2025 14:00:33 +0300
X-Yandex-Fwd: 2
Authentication-Results-Original:
mail-nwsmtp-mxback-production-main-47.vla.yp-c.yandex.net; dkim=pass
header.i=@bankofchina.com
Received: from
postback17a.mail.yandex.net (
postback17a.mail.yandex.net [2a02:6b8:c0e:500:1:45:d181:da17])
by
fbebzsja7lz3ffco.vla.yp-c.yandex.net (notsolitesrv/Yandex) with LMTPS id E23UrH2hKvK0-4qf4qQ7g
for <xxx@domain.com>; Thu, 10 Jul 2025 14:00:33 +0300
Received: from
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net (
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net [IPv6:2a02:6b8:c1f:5e89:0:640:7435:0])
by
postback17a.mail.yandex.net (Yandex) with ESMTPS id 14A9B609E9
for <xxx@domain.com>; Thu, 10 Jul 2025 14:00:33 +0300 (MSK)
Received: from
bocmg.boc.cn (
mx4.bankofchina.com [219.141.191.6])
by
mail-nwsmtp-mxfront-production-main-77.vla.yp-c.yandex.net (mxfront/Yandex) with ESMTPS id Q0hSgYAFH4Y0-9VTC7VGY;
Thu, 10 Jul 2025 14:00:29 +0300
Received: from
bocmg.boc.cn (unknown [127.0.0.1])
by IMSVA (Postfix) with ESMTP id 64E5063CDE
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=
bankofchina.com;
s=mail2; t=1752145225;
bh=a2B0ff5lOgIxI7T8UYsXxhdCvQ/vyH5c+CBe67nccIA=; h=From;
b=PcUZZainFM9LcGziMNdrB7LKhRXym9d1g1EraTZcrwwQCnhQtR1lSvldAJquu45Lt
eBOazTwW66Hsawq8SWwJHaUz2jLkKeGONbNzWLQ0zChPaIWjLum2/XVI6r1IOg/vzA
8283fVApJkRZk1P1ZdwdsYgSM3/AG/xQvVWmjcF9mxDuWSXyfMUL2Vj2L804YDokuA
M813pU5HypoolQjaqfb6PO+tP48SeNxWLkNoN8Npr0GZp0SRLf8xTfn7zxPqwr3w6M
afu56ZxPx1s1LAHCC3W+atDlaYzlz/vMNZDWheHkDFC9tQl3f819HTw/KpHDqADMVF
m8tzXdIvEuq3A==
Received: from
bocmg.boc.cn (unknown [127.0.0.1])
by IMSVA (Postfix) with ESMTP id 4908363CDC
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
Received: from P1BCSPPL01 (unknown [21.124.190.66])
by
bocmg.boc.cn (Postfix) with ESMTP
for <xxx@domain.com>; Thu, 10 Jul 2025 19:00:25 +0800 (CST)
Message-ID: <2069778417.1752145225248.JavaMail.bcsp@P1BCSPPL01>
Date: Thu, 10 Jul 2025 19:00:25 +0800
From: boczhangdan@bankofchina.com
To: <bxxx@domain.com>
Subject: =?GBK?B?1tC5+tL40NDQxdPDv6i159fT1cu1pQ==?=
Content-Type: multipart/mixed;
boundary="----=_Part_23425685_670355975.1752145225248"
X-Yandex-Forward: e8261cefa706a7538911b4c26e23e60d
````