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![Postfix - Checking for an Open Relay | Knowledge Center | Rackspace Hosting]()
www.rackspace.comOpen relays are a bad thing — they allow anyone to send email from your mail server. The mail server does not check that it is authorized to send mail from the mail address on the third-party email. What this means is that anyone can send email via your C瀏覽：1190 -
![Test mail server for an open relay - nixCraft]()
www.cyberciti.bizIt is depend upon your MTA. For example postfix use following directives: smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination, permit_mynetworks, reject_unknown_recipient_domain, reject_rbl_client relays.ordb.org, reject_rb瀏覽：1424
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日期：2026-04-21
2014年6月16日 - By default, Postfix does not run as an open relay. However, checking for one is very ......
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日期：2026-04-23
Dear 各位大大 小弟的postfix mail server 的main.cf 把註解殺掉後的設定如下 請問出了 ......
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日期：2026-04-21
Diagnostics To check if your server is really acting as an open relay try to connect to it from another server ... 220 hostname ESMTP Postfix mail from: test@domain. tld 250 2.1.0 Ok rcpt to: ......
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日期：2026-04-18
Open relay, yet again, concerns me. I followed the Falko's guide on installing Debian ......
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日期：2026-04-24
2012年8月29日 - I can now send email and it works, but MX tests say that it is an open relay ( obviously ......
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日期：2026-04-18
... sites such as open mail relays, open web proxies, and home computers that have been compromised ......
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日期：2026-04-24
2010年7月16日 - As I have been reiterating all week, an open relay is a bad idea. If your mail server is ......
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日期：2026-04-19
2012年12月5日 - 1，什么是open-relay ? 顾名思义，relay的转发的意思， Open-Relay（开放转发或匿名 ......
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