http://www.josefg.com/journal/2007/09/14/exchange-server-message-host-unreachable/ Life, the Universe and Everything Mon, 21 May 2012 06:40:19 +0000 http://wordpress.org/?v=2.6 http://www.josefg.com/journal/2007/09/14/exchange-server-message-host-unreachable/#comment-7039 JJG Wed, 27 Aug 2008 14:14:16 +0000 http://www.josefg.com/journal/2007/09/14/exchange-server-message-host-unreachable/#comment-7039 Yeah, when running McAfee VirusScan Enterprise or similar it's important to add "mapisp32.exe, msexcimc.exe" to the "Grant Port 25 Access" box, when ports 25 port blocking is enabled: Else the same "Host unreachable" message will result. Yeah, when running McAfee VirusScan Enterprise or similar it’s important to add “mapisp32.exe, msexcimc.exe” to the “Grant Port 25 Access” box, when ports 25 port blocking is enabled: Else the same “Host unreachable” message will result.

]]> http://www.josefg.com/journal/2007/09/14/exchange-server-message-host-unreachable/#comment-7038 Aaron Corneail Wed, 27 Aug 2008 13:22:01 +0000 http://www.josefg.com/journal/2007/09/14/exchange-server-message-host-unreachable/#comment-7038 I had a similar problem with Exchange 5.5 outgoing 'host unreachable' messages. The problem originated in our Mcafee Antivirus program. The access protection settings prevented Exchange from sending because the 'prevent mass mailing worms from sending mail' option is turned on by default and the Exchange executable wasn't added as an exception. I had a similar problem with Exchange 5.5 outgoing ‘host unreachable’ messages. The problem originated in our Mcafee Antivirus program. The access protection settings prevented Exchange from sending because the ‘prevent mass mailing worms from sending mail’ option is turned on by default and the Exchange executable wasn’t added as an exception.

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