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Old 28th September 2010, 12:11
till till is offline
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You seem to run your server on a dynamic IP which causes other systems to block your server as emails from dynamic IP addresses are normally spam. There are two solutions:

a) Get a fixed IP address for your internet connection.
b) Relay the emails trough the mailserver of your ISP instead of sending it directly from your server. You can set a email relayserver incl. username and password in ispconfig 3 under system > server config on the email tab.
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Till Brehm
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Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.
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