Помогите,
Ставим наши Сервер Exchange (10.0.0.125) за Прокси-сервер SMTP (Xeams, если вы слышали об этом), однако в последнее время наши клиенты жалуются, что мы отвечаем на их электронную почту слишком поздно - и мы обнаружили, что на самом деле мы получаем их электронную почту на несколько часов, а иногда и с задержкой на день!
Прокси-сервер Xeams, который у нас есть, сидит перед нашим Exchange, используя IP 10.0.0.10, и прослушивает все внешние запросы, поступающие в наш Брандмауэр (10.0.0.1) и если это квалифицированный ретранслятор (10.0.0.x), он затем будет ретранслировать электронную почту, которая включает ретрансляцию электронной почты с нашего сервера Exchange (10.0.0.125).
Я плохо разбираюсь в сети, поэтому понятия не имею, заметил ли я здесь правильную проблему, которая вызывает задержки: я обнаружил, что существует огромное количество одновременных подключений к нашему серверу Xeams, пытающихся ретранслировать, и большинство из них происходят из ниоткуда, но пытается отправить спам на "xxx@yahoo.com.tw"похожий адрес электронной почты, и я предполагаю, что это рабочая нагрузка по отказу от тех запросов на ретрансляцию, которые задерживают наши входящие / исходящие электронные письма ... Кто-нибудь может помочь, пожалуйста !!
===== Вот несколько журналов, которые я взял с нашего почтового прокси =======
2014-03-20 14:58:29,994 - [ 74061] C --> RCPT TO:<friend56tina@yahoo.com.tw>
2014-03-20 14:58:30,371 - [ 74058] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:30,371 - [ 74058] C --> RCPT TO:<s84478@yahoo.com.tw>
2014-03-20 14:58:30,863 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:30,863 - [ 74059] C --> RCPT TO:<s855742@yahoo.com.tw>
2014-03-20 14:58:31,291 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:31,291 - [ 74060] C --> RCPT TO:<s19000215@yahoo.com.tw>
2014-03-20 14:58:34,297 - [ 74057] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:34,297 - [ 74057] C --> DATA
2014-03-20 14:58:34,297 - [ 74057] S <-- 503 Send RCPT TO before DATA command
2014-03-20 14:58:35,010 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:35,010 - [ 74061] C --> RCPT TO:<friend5720@yahoo.com.tw>
2014-03-20 14:58:35,402 - [ 74058] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:35,402 - [ 74058] C --> RCPT TO:<s84484@yahoo.com.tw>
2014-03-20 14:58:35,876 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:35,876 - [ 74059] C --> RCPT TO:<s8557475s8557475@yahoo.com.tw>
2014-03-20 14:58:36,305 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:36,305 - [ 74060] C --> RCPT TO:<s190005@yahoo.com.tw>
2014-03-20 14:58:36,914 - [ 74062] ************ New connection from: 117.141.200.224
2014-03-20 14:58:37,293 - [ 74062] C --> EHLO PC-201205080653
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-EXCHANGE.webcider.com Hello [10.0.0.20]
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-SIZE 377487360
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-PIPELINING
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-DSN
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-ENHANCEDSTATUSCODES
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-AUTH NTLM
2014-03-20 14:58:37,293 - [ 74062] S <-- 250-8BITMIME
2014-03-20 14:58:37,293 - [ 74062] S <-- 250 OK
2014-03-20 14:58:37,685 - [ 74062] C --> RSET
2014-03-20 14:58:40,018 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:40,018 - [ 74061] C --> RCPT TO:<friend5731@yahoo.com.tw>
2014-03-20 14:58:40,416 - [ 74058] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:40,416 - [ 74058] C --> RCPT TO:<s84485@yahoo.com.tw>
2014-03-20 14:58:40,900 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:40,900 - [ 74059] C --> RCPT TO:<s85579280@yahoo.com.tw>
2014-03-20 14:58:41,029 - [ 74063] ************ New connection from: 117.174.132.109
2014-03-20 14:58:41,312 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:41,312 - [ 74060] C --> RCPT TO:<s19001008@yahoo.com.tw>
2014-03-20 14:58:41,500 - [ 74063] C --> EHLO PC-201205081432
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-EXCHANGE.webcider.com Hello [10.0.0.20]
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-SIZE 377487360
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-PIPELINING
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-DSN
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-ENHANCEDSTATUSCODES
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-AUTH NTLM
2014-03-20 14:58:41,500 - [ 74063] S <-- 250-8BITMIME
2014-03-20 14:58:41,500 - [ 74063] S <-- 250 OK
2014-03-20 14:58:41,994 - [ 74063] C --> RSET
2014-03-20 14:58:42,697 - [ 74062] S <-- 250 2.0.0 Resetting
2014-03-20 14:58:42,697 - [ 74062] C --> MAIL FROM:<tukwnhc@yahoo.com>
2014-03-20 14:58:42,697 - [ 74062] S <-- 250 2.1.0 Sender OK
2014-03-20 14:58:42,697 - [ 74062] C --> RCPT TO:<pink781215@yahoo.com.tw>
2014-03-20 14:58:45,035 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:45,035 - [ 74061] C --> RCPT TO:<friend585@yahoo.com.tw>
2014-03-20 14:58:45,428 - [ 74058] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:45,428 - [ 74058] C --> DATA
2014-03-20 14:58:45,428 - [ 74058] S <-- 503 Send RCPT TO before DATA command
2014-03-20 14:58:45,905 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:45,905 - [ 74059] C --> RCPT TO:<s85579972532@yahoo.com.tw>
2014-03-20 14:58:46,319 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:46,319 - [ 74060] C --> RCPT TO:<s19001030@yahoo.com.tw>
2014-03-20 14:58:47,001 - [ 74063] S <-- 250 2.0.0 Resetting
2014-03-20 14:58:47,001 - [ 74063] C --> MAIL FROM:<qrqsqz@yahoo.com>
2014-03-20 14:58:47,001 - [ 74063] S <-- 250 2.1.0 Sender OK
2014-03-20 14:58:47,001 - [ 74063] C --> RCPT TO:<in9456@yahoo.com.tw>
2014-03-20 14:58:47,520 - [ 74057] ~~~~~~~~~~~~ Connection Terminated (124353:999999)
2014-03-20 14:58:47,688 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:47,688 - [ 74062] C --> RCPT TO:<je76921@yahoo.com.tw>
2014-03-20 14:58:50,031 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:50,031 - [ 74061] C --> RCPT TO:<friend58630@yahoo.com.tw>
2014-03-20 14:58:50,923 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:50,923 - [ 74059] C --> RCPT TO:<s8557s8557@yahoo.com.tw>
2014-03-20 14:58:51,316 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:51,316 - [ 74060] C --> RCPT TO:<s19001042@yahoo.com.tw>
2014-03-20 14:58:52,026 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:52,026 - [ 74063] C --> RCPT TO:<in950109@yahoo.com.tw>
2014-03-20 14:58:52,694 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:52,694 - [ 74062] C --> RCPT TO:<nhcaitw@yahoo.com.tw>
2014-03-20 14:58:55,048 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:55,048 - [ 74061] C --> RCPT TO:<friend58799@yaho.com.tw>
2014-03-20 14:58:55,937 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:55,937 - [ 74059] C --> RCPT TO:<s855828000@yahoo.com.tw>
2014-03-20 14:58:56,334 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:56,334 - [ 74060] C --> RCPT TO:<s19001044@yahoo.com.tw>
2014-03-20 14:58:57,035 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:57,035 - [ 74063] C --> RCPT TO:<in950629@yahoo.com.tw>
2014-03-20 14:58:57,696 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:58:57,696 - [ 74062] C --> RCPT TO:<nico0620@yahoo.com.tw>
2014-03-20 14:58:58,944 - [ 74058] ~~~~~~~~~~~~ Connection Terminated (126028:999999)
2014-03-20 14:59:00,061 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:00,061 - [ 74061] C --> RCPT TO:<friend5922@yahoo.com.tw>
2014-03-20 14:59:00,947 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:00,947 - [ 74059] C --> RCPT TO:<s85583199@yahoo.com.tw>
2014-03-20 14:59:01,341 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:01,341 - [ 74060] C --> RCPT TO:<s19001046@yahoo.com.tw>
2014-03-20 14:59:02,041 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:02,041 - [ 74063] C --> RCPT TO:<in952341@yahoo.com.tw>
2014-03-20 14:59:02,704 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:02,704 - [ 74062] C --> RCPT TO:<mm771031@yahoo.com.tw>
2014-03-20 14:59:05,073 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:05,073 - [ 74061] C --> RCPT TO:<friend592@yahoo.com.tw>
2014-03-20 14:59:05,944 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:05,944 - [ 74059] C --> RCPT TO:<s85584298@yahoo.com.tw>
2014-03-20 14:59:06,368 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:06,368 - [ 74060] C --> RCPT TO:<s19001088@yahoo.com.tw>
2014-03-20 14:59:07,044 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:07,044 - [ 74063] C --> RCPT TO:<in96552000@yahoo.com.tw>
2014-03-20 14:59:07,729 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:07,729 - [ 74062] C --> RCPT TO:<mika96951@yahoo.com.tw>
2014-03-20 14:59:10,072 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:10,072 - [ 74061] C --> RCPT TO:<friend594@yahoo.com.tw>
2014-03-20 14:59:10,945 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:10,945 - [ 74059] C --> RCPT TO:<s85584975@yahoo.com.tw>
2014-03-20 14:59:11,360 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:11,360 - [ 74060] C --> RCPT TO:<s19001092@yahoo.com.tw>
2014-03-20 14:59:12,072 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:12,072 - [ 74063] C --> RCPT TO:<in968@yahoo.com.tw>
2014-03-20 14:59:12,744 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:12,744 - [ 74062] C --> RCPT TO:<niki9955@yahoo.com.tw>
2014-03-20 14:59:15,077 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:15,077 - [ 74061] C --> RCPT TO:<friend598@yahoo.com.tw>
2014-03-20 14:59:15,948 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:15,948 - [ 74059] C --> RCPT TO:<s85585589@yahoo.com.tw>
2014-03-20 14:59:16,356 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:16,356 - [ 74060] C --> RCPT TO:<s19001093@yahoo.com.tw>
2014-03-20 14:59:16,860 - [ 74064] ************ New connection from: 27.18.22.158
2014-03-20 14:59:17,074 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:17,074 - [ 74063] C --> RCPT TO:<in9822@yahoo.com.tw>
2014-03-20 14:59:17,508 - [ 74064] C --> EHLO PC-201401110338
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-EXCHANGE.webcider.com Hello [10.0.0.20]
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-SIZE 377487360
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-PIPELINING
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-DSN
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-ENHANCEDSTATUSCODES
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-AUTH NTLM
2014-03-20 14:59:17,508 - [ 74064] S <-- 250-8BITMIME
2014-03-20 14:59:17,508 - [ 74064] S <-- 250 OK
2014-03-20 14:59:17,751 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:17,751 - [ 74062] C --> RCPT TO:<n1245990@yahoo.com.tw>
2014-03-20 14:59:18,175 - [ 74064] C --> RSET
2014-03-20 14:59:20,089 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:20,089 - [ 74061] C --> RCPT TO:<friend5s@yahoo.com.tw>
2014-03-20 14:59:20,963 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:20,963 - [ 74059] C --> RCPT TO:<s855855@yahoo.com.tw>
2014-03-20 14:59:21,370 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:21,370 - [ 74060] C --> RCPT TO:<s19001111@yahoo.com.tw>
2014-03-20 14:59:22,097 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:22,097 - [ 74063] C --> RCPT TO:<in9865@yahoo.com.tw>
2014-03-20 14:59:22,776 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:22,776 - [ 74062] C --> RCPT TO:<p24970151@yahoo.com.tw>
2014-03-20 14:59:23,177 - [ 74064] S <-- 250 2.0.0 Resetting
2014-03-20 14:59:23,177 - [ 74064] C --> MAIL FROM:<yew@yahoo.com>
2014-03-20 14:59:23,177 - [ 74064] S <-- 250 2.1.0 Sender OK
2014-03-20 14:59:23,177 - [ 74064] C --> RCPT TO:<dominique168@yahoo.com.tw>
2014-03-20 14:59:25,112 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:25,112 - [ 74061] C --> RCPT TO:<friend5tw@yahoo.com.tw>
2014-03-20 14:59:25,956 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:25,956 - [ 74059] C --> RCPT TO:<s85587s@yahoo.com.tw>
2014-03-20 14:59:26,370 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:26,370 - [ 74060] C --> RCPT TO:<s19002023@yahoo.com.tw>
2014-03-20 14:59:27,120 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:27,120 - [ 74063] C --> RCPT TO:<in9876543@yahoo.com.tw>
2014-03-20 14:59:27,785 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:27,785 - [ 74062] C --> RCPT TO:<jbps936211@yahoo.com.tw>
2014-03-20 14:59:28,194 - [ 74064] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:28,194 - [ 74064] C --> RCPT TO:<dominique3317@yahoo.com.tw>
2014-03-20 14:59:30,129 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:30,129 - [ 74061] C --> RCPT TO:<friend60227@yahoo.com.tw>
2014-03-20 14:59:30,973 - [ 74059] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:30,973 - [ 74059] C --> DATA
2014-03-20 14:59:30,973 - [ 74059] S <-- 503 Send RCPT TO before DATA command
2014-03-20 14:59:31,356 - [ 74060] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:31,356 - [ 74060] C --> DATA
2014-03-20 14:59:31,356 - [ 74060] S <-- 503 Send RCPT TO before DATA command
2014-03-20 14:59:32,135 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:32,135 - [ 74063] C --> RCPT TO:<in9877@yahoo.com.tw>
2014-03-20 14:59:32,803 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:32,803 - [ 74062] C --> RCPT TO:<pei582001@yahoo.com.tw>
2014-03-20 14:59:33,186 - [ 74064] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:33,186 - [ 74064] C --> RCPT TO:<dominique424@yahoo.com.tw>
2014-03-20 14:59:35,151 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:35,151 - [ 74061] C --> RCPT TO:<friend60321@yahoo.com.tw>
2014-03-20 14:59:37,139 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:37,139 - [ 74063] C --> RCPT TO:<in9889@yahoo.com.tw>
2014-03-20 14:59:37,823 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:37,823 - [ 74062] C --> RCPT TO:<mjnba23@yahoo.com.tw>
2014-03-20 14:59:38,198 - [ 74064] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:38,198 - [ 74064] C --> RCPT TO:<dominique6006@yahoo.com.tw>
2014-03-20 14:59:40,167 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:40,167 - [ 74061] C --> RCPT TO:<friend60507@yahoo.com.tw>
2014-03-20 14:59:42,156 - [ 74063] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:42,156 - [ 74063] C --> RCPT TO:<in9902@yahoo.com.tw>
2014-03-20 14:59:42,828 - [ 74062] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:42,828 - [ 74062] C --> RCPT TO:<n224793999@yahoo.com.tw>
2014-03-20 14:59:43,221 - [ 74064] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:43,221 - [ 74064] C --> RCPT TO:<dominique64tw@yahoo.com.tw>
2014-03-20 14:59:44,007 - [ 74059] ~~~~~~~~~~~~ Connection Terminated (124147:999999)
2014-03-20 14:59:44,610 - [ 74060] ~~~~~~~~~~~~ Connection Terminated (124300:999999)
2014-03-20 14:59:45,171 - [ 74061] S <-- 550 5.7.1 Unable to relay
2014-03-20 14:59:45,171 - [ 74061] C --> RCPT TO:<friend605@yahoo.com.tw>
SMTP не дает никаких гарантий доставки и не гарантирует своевременной доставки. единственное, что вы можете сделать, это исключить ваши системы как причину задержки. Вот что я бы посоветовал: найдите образец электронного письма, отправленного от вашего клиента, и сравните время, которое оно дошло до вашего брандмауэра, со временем, когда оно дошло до вашего прокси, а затем со временем, когда оно дошло до вашего сервера Exchange. Если есть большая задержка, вы можете глубже понять, почему это происходит. Если задержки нет, проблема, вероятно, не на вашей стороне, и вы ничего не можете с этим поделать.