简介
本文档介绍本地环境、虚拟环境(ESA)和云环境(CES)的安全邮件平台上的发件人域信誉(SDR)更改。
问:在SDR AsyncOS 14.2.0上进行了哪些更改?
警告:升级至14.2时,系统会自动更改针对受污染裁决和/或弱裁决的拒绝操作的SDR配置。配置会将ESA SDR配置更改为在中性威胁级别拒绝。
1) SDR传统判定更改现在命名为威胁级别的判定,如图所示:
注意:这是SDR扫描行为使用不同判定决策机制的更改。切勿期望每组发件人信息的判定结果都与旧解决方案匹配。
2) 由SDR的高级条件替换为“邮件跟踪”(Message Tracking),如下所示:
3) SDR威胁类别银行欺诈更改为电子银行欺诈,如图所示:
注意:所有不受信任的SDR没有列出类别,但是“垃圾邮件”、“恶意”等SDR类别被标记为不受信任或可疑。
4) mail_logs包含用于SDR裁决的附加日志行,如果发件人信誉未被拒绝,则在From logline之后写入。第二行SDR显示在邮件日志中。
Info: Start MID 11 ICID 19884
Info: MID 11 ICID 19884 From: test@cisco.com
Info: MID 11 SDR: Domains for which SDR is requested: reverse DNS host: Not Present, helo: desktop-9pf6f2t, env-from: cisco.com, header-from: Not Present, reply-to: Not Present
Info: MID 11 SDR: Consolidated Sender Threat Level: Favorable, Threat Category: N/A, Suspected Domain(s) : N/A (other reasons for verdict). Sender Maturity: 30 days (or greater) for domain: cisco.com
Info: MID 11 ICID 19884 RID 0 To: test@cisco.com
Info: MID 11 Message-ID 'op.1m7bljjr8qfre9@desktop-9pf6f2t'
Info: MID 11 Subject "test 1"
Info: MID 11 SDR: Domains for which SDR is requested: reverse DNS host: Not Present, helo: desktop-9pf6f2t, env-from: cisco.com, header-from: cisco.com, reply-to: Not Present
Info: MID 11 SDR: Consolidated Sender Threat Level: Favorable, Threat Category: N/A, Suspected Domain(s) : N/A (other reasons for verdict). Sender Maturity: 30 days (or greater) for domain: cisco.com
Info: MID 11 SDR: Tracker Header : 629d04c8_DDZqM4buLke8/Do4MqUGdJEP9QZc73Ofsh9YLwqvKidy3M/WEb0fkQpwOOtRVhrhSJWgCv2NjL/JQMsjH5QzZw==
5) 在全局设置中配置为拒绝的SDR发生在SMTP会话的信封阶段,即在发送报头的信封且尚未发送其他数据之后发生。
Info: Start MID 9364 ICID 79
Info: MID 9364 ICID 79 From: <test@incomingtest.contentfilter.com>
Info: MID 9364 SDR: Domains for which SDR is requested: reverse DNS host: Not Present, helo: mail.cisco.com, env-from: lana.cf, header-from: Not Present, reply-to: Not Present
Info: MID 9364 SDR: Consolidated Sender Threat Level: Untrusted, Threat Category: N/A, Suspected Domain(s) : lana.cf. Sender Maturity: 1 day for domain: lana.cf
Info: MID 9364 ICID 79 Receiving Failed: Message rejected by Sender Domain Reputation engine
Info: MID 9364 SDR: Tracker Header : 629d5de5_JxmxzLXzbSob4h6Tqmxj2QFeN6eeb3J8CJ2zj9h8XgF/+e0YQVxd05lnVSwX9Gh37ISaiDHc0SJ5eRdyLYasmQ==
Info: MID 9364 Subject ""
Info: Message aborted MID 9364 Receiving aborted
Info: Message finished MID 9364 aborted
6)由于“Cisco Bug ID CSCwb32685”中提供的预期行为,以及此处的“Field Notice: FN - 72389 - Cisco Secure Email Gateway: Talos Domain Age Update”,您不能使用过滤器中的三个条件:小于、等于和小于等于,否则符合策略的所有域均符合条件,如图所示:
注意:发件人成熟度设置为30天的限制,超过此限制后,域将被视为电子邮件发件人成熟,且不提供其他详细信息。
相关信息
Cisco Secure Email AsyncOS 14.2版本说明。
Cisco Secure Email and Web Manager AsyncOS 14.2版本说明。
现场通知:FN - 72389 -思科安全电邮网关:Talos域年龄更新