Plesk 8 Server Administrator Manual

Dedicated Server Plesk Server Administrator Manual
000
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060	061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120	121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180	181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
By SwSoft

Setting Up Anti-Spam Protection

To protect your users from spam, you can use the following tools with your control panel:

SpamAssassin spam filter. It is a powerful spam filter that uses a wide variety of local and network tests to identify spam signatures.
You can configure the spam filter so as to either delete suspicious messages when they come to your mail server, or change the subject line and add "X-Spam-Flag: YES" and "X-Spam-Status: Yes" headers to the messages. The latter can be useful for users who prefer to filter mail with mail filtering programs installed on their own computers.

To learn more about SpamAssassin, visit http://spamassassin.apache.org.

To configure and switch on the SpamAssassin filter, proceed to the Setting Up SpamAssassin Spam Filter section.
DNS blackhole lists. This spam prevention system is based on DNS queries made by your mail server to a database, which contains known and documented sources of spam, as well as an extensive listing of dynamic IP addresses. Any positive response from this database should result in your mail server returning a '550' error, or rejection of the requested connection.
To configure your mail server for working with DNSBL databases, proceed to the Switching On Spam Protection Based on DNS Blackhole Lists section.
Sender Policy Framework (SPF). This spam prevention system is also DNS query-based. It is designed to reduce the amount of spam sent from forged e-mail addresses. With SPF, an Internet domain owner can specify the addresses of machines that are authorized to send e-mail for users of his or her domain. Receivers that implement SPF then treat as suspect any e-mail that claims to come from that domain but fails to come from locations that domain authorizes.
To learn more about SPF, visit http://www.openspf.org/howworks.html.

To enable filtering based on SPF, proceed to the Setting Up Support for Sender Policy Framework System section.
Server-wide black and white lists. Black and white lists are standard mail server facilities. You can use the black list to specify the domains from which mail must not be accepted, and white list to specify the IP addresses of machines or networks from which mail must always be accepted.
To set up server-wide black and white lists, proceed to the Setting Up Server-wide Black and White Lists section.

| Dedicated Server and Dedicated Hosting