Administrator's Guide - Kerio Software Archive

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Chapter 15 Sending and Receiving MailMax. number of unknown recipientsAlso known as a Directory harvest attack, this condition is met when an application thatguesses common usernames of recipients’ fails up to the number of allowed unknown recipients.If this type of protection is enabled, the server sending messages to an unknownrecipient is blocked for an hour.Do not apply these limits to IP address groupGroup of IP addresses on which the limitations will not be applied. This rule is often usedfor groups of local users (see the Relay Control tab). These users send all their outgoingmail through Kerio MailServer — the count of messages sent by these users to this serveris therefore much higher than the number of messages sent by external users (servers)that use it only to deliver mail to local domains.It is also recommended to include the secondary SMTP server to the list of allowed IPaddresses, because in some cases, its behavior can be similar to that of an attackingserver.Figure 15.3Security Options — Advanced optionsBlock if sender’s mail domain...When a message is received Kerio MailServer checks whether the sender’s domain hasa record in DNS. If not, the message will be rejected. This feature protects from senderswith fictional email addresses.Note: This function may slow down Kerio MailServer (responses of DNS servers may takeup to several seconds).Max. number of recipients in a messageMaximum number of message recipients that will be accepted (in number of Rcpt commandsin the SMTP envelope).Max. number of failed commands...Spam is often sent by special applications that connect to SMTP servers and ignore itserror reports. If this option is enabled, Kerio MailServer will close the SMTP connectionautomatically after the defined number of failed commands has been expired.144
15.2 SMTP serverLimit maximum incoming SMTP message size toMaximum size of a message that will be accepted by the SMTP server. This protects theserver from being overloaded by large messages, therefore we strongly recommend toactivate this option. The 0 value means that no limitation is set. For easy definition youcan switch between kilobytes (KB) and megabytes (MB).Maximum number of accepted Received headers (hops)This parameter helps the server block messages that have been trapped in a loop.SMTP Delivery tabIn this section, the delivery parameters can be also set:Figure 15.4SMTP Delivery tabDeliver directly using DNS MX recordsMail will be delivered directly to destination domains using MX records.Use relay SMTP serverAll outgoing mail will be sent via another relay SMTP server.145
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Administrator’s GuideKerio Techno
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36 Support for ActiveSync . . . . .
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Chapter 1 IntroductionPersonal and
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1.2 Quick ChecklistBlackBerry suppo
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1.2 Quick Checklist11. If email for
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2.2 Conflicting software2.2 Conflic
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2.4 InstallationBy default, Kerio M
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2.4 InstallationSelect a folder whe
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2.4 InstallationFigure 2.5Custom in
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2.4 InstallationKerio MailServer En
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2.4 InstallationThe product support
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2.4 Installation(Kerio Administrati
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2.5 Configuration WizardNote: The c
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2.5 Configuration WizardFigure 2.16
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2.6 Upgrade and UninstallationWhen
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Chapter 3Product Registration and L
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3.2 Registration with the administr
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3.2 Registration with the administr
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3.3 License information and import
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3.4 Licensing policyOnce number of
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4.1 Kerio MailServer MonitorFigure
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4.2 Standalone processes of the ser
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5.2 Administration WindowThe same d
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5.2 Administration WindowStatus bar
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Chapter 6ServicesIn Configuration
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6.1 Service Parameter Settings• a
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6.1 Service Parameter SettingsFigur
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6.3 TroubleshootingFigure 6.5The De
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Chapter 7DomainsKerio MailServer ca
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7.2 GeneralFigure 7.2Domain setting
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7.4 FootersFigure 7.3Domain setting
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7.5 ForwardingFigure 7.5Domain sett
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7.6 Setting of Directory ServicesFi
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7.6 Setting of Directory ServicesFi
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7.7 Advanced7.7 AdvancedIn the Adva
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7.8 WebMail Logo3. In the Logging m
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8.2 Sending High Priority MessagesW
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Chapter 9SchedulingKerio MailServer
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9.2 Optimal Scheduling9.2 Optimal S
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10.1 Kerio MailServer CertificateFi
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10.1 Kerio MailServer Certificate
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10.2 Install certificates on client
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10.2 Install certificates on client
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Page 95 and 96: 11.3 LanguageIf there is one of the
Page 97 and 98: 11.3 LanguageFigure 11.1Dictionary
Page 99 and 100: 12.2 Time IntervalsClick on Add to
Page 101 and 102: 12.3 Setting Remote AdministrationF
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Page 105 and 106: 13.2 Creating a user accountWarning
Page 107 and 108: 13.2 Creating a user accountFigure
Page 109 and 110: 13.2 Creating a user accountStore p
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Page 113 and 114: 13.2 Creating a user accountFigure
Page 115 and 116: 13.3 Editing User AccountNote: When
Page 117 and 118: 13.5 Removing user accountsKerio Ma
Page 119 and 120: 13.9 Administration of mobile devic
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Page 123 and 124: 13.10 Import Users• MailAddress
Page 125 and 126: 13.10 Import UsersFor detailed info
Page 127 and 128: 13.10 Import UsersFigure 13.24Impor
Page 129 and 130: 13.12 User Account TemplatesNote: C
Page 131 and 132: Chapter 14User groupsUser accounts
Page 133 and 134: 14.1 Creating a User GroupGroup add
Page 135 and 136: 14.1 Creating a User GroupPublish t
Page 137 and 138: 15.1 Mail Delivery over the Interne
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Page 141 and 142: 15.2 SMTP serverinterface originall
Page 143: 15.2 SMTP serverAuthentication by I
Page 147 and 148: 15.3 AliasesMaximum number of deliv
Page 149 and 150: 15.3 AliasesCharacter typea-zA-ZDes
Page 151 and 152: 15.4 remote POP3 mailboxesFigure 15
Page 153 and 154: 15.4 remote POP3 mailboxesthe messa
Page 155 and 156: 15.4 remote POP3 mailboxesFigure 15
Page 157 and 158: 15.6 Advanced OptionsDescriptionA c
Page 159 and 160: 15.6 Advanced Optionsnot have to wo
Page 161 and 162: 15.6 Advanced OptionsPLAIN authenti
Page 163 and 164: 15.6 Advanced OptionsWatchdog Hard
Page 165 and 166: 15.6 Advanced OptionsFigure 15.22HT
Page 167 and 168: 15.6 Advanced Optionsstartup of the
Page 169 and 170: 15.6 Advanced OptionsKerio WebMail
Page 171 and 172: 16.1 Spam Rating tab16.1 Spam Ratin
Page 173 and 174: 16.2 Blacklists tabtration Console
Page 175 and 176: 16.2 Blacklists tabInternet databas
Page 177 and 178: 16.3 Custom RulesSORBSSpam and Open
Page 179 and 180: 16.3 Custom RulesUse the Add button
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Page 183 and 184: 16.4 SpamAssassinFigure 16.7SpamAss
Page 185 and 186: 16.5 Email policy records checksend
Page 187 and 188: 16.6 Spam repellentFigure 16.9SPFOn
Page 189 and 190: 16.7 Recommended configuration of a
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Page 193 and 194: 16.8 Monitoring of spam filter’s
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16.8 Monitoring of spam filter’s
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17.1 Integrated McAfee Anti-VirusBe
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17.4 Server responses to detection
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17.5 Filtering Email Attachments17.
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17.6 Antivirus control statisticsFi
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18.1 ArchivingPath to the archive d
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18.2 Backup of user foldersFigure 1
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18.2 Backup of user foldersFigure 1
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18.2 Backup of user folders• Save
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18.2 Backup of user folders2. The s
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Chapter 19LDAP serverThe built-in L
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19.2 Configuring Email ClientsFigur
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19.2 Configuring Email ClientsMaxim
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20.2 Creating a Mailing List• con
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20.2 Creating a Mailing ListFigure
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20.3 Posting rulesFigure 20.4Creati
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20.4 Moderators and MembersAdd this
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20.4 Moderators and MembersAdding a
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20.5 Mailing list archiving2. This
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20.7 How to use Mailing ListsExampl
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Chapter 21Status InformationKerio M
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21.2 Message queue processingFrom,
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21.3 Active ConnectionsActive Conne
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21.4 Opened FoldersComponentsThree
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21.5 Traffic ChartsTime rangeIn the
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21.6 StatisticsRefreshThis button r
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22.1 Log settingsFigure 22.2Save lo
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22.1 Log settingsLog debugSelect th
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22.3 MailAuth_type=’0’, Passwor
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22.4 SecurityMailing list messagesT
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22.4 SecurityAntibombingServer over
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22.8 Debug• From: jsmith@company.
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22.8 Debug• IMAP Server — commu
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22.9 Performance Monitor (under Win
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23.1 Viewing public folders in indi
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24.1 Kerio MailServer on WindowsFig
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24.1 Kerio MailServer on WindowsFig
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24.2 Kerio MailServer on LinuxExamp
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24.2 Kerio MailServer on Linuxdebug
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24.3 Kerio MailServer on Mac OSTo e
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24.3 Kerio MailServer on Mac OSFigu
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24.4 Starting Open Directory and Ke
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24.4 Starting Open Directory and Ke
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Figure 25.1Setting Windows NT domai
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25.1 Setting NTLM in MS Outlook ext
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Chapter 26Kerio MailServer Environm
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26.3 FirewallFrom technical reasons
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Chapter 27Deployment ExamplesThis c
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27.2 Dial-up Line + Domain Mailboxi
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27.4 A company with multiple sites5
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27.4 A company with multiple sitesF
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27.5 Setting up the backup mail ser
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Chapter 28Troubleshooting in Kerio
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28.2 Configuration Backup and Trans
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29.1 Installation of Active Directo
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29.3 User Account DefinitionFigure
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Chapter 30Kerio Open Directory Exte
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Chapter 31KMS Web AdministrationKMS
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31.2 Setting access rights to the w
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31.5 Page headerFigure 31.4Web Admi
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31.6 Welcome pageLocalizations of K
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31.7 User accountsFigure 31.8Templa
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31.7 User accountsFigure 31.10User
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31.7 User accountsFigure 31.12User
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31.8 User groupsMove user’s messa
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31.8 User groupsFigure 31.16Group a
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31.9 AliasesPublish this group info
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31.9 AliasesFigure 31.20Alias creat
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32.1 Kerio Outlook Connector (Offli
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32.2 Kerio Outlook ConnectorFigure
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32.2 Kerio Outlook ConnectorTIP: If
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32.2 Kerio Outlook ConnectorUse the
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32.2 Kerio Outlook ConnectorNote: I
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33.1 Installation• MS Outlook 200
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33.1 InstallationNote: Kerio Synchr
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34.2 Windows Calendar34.2 Windows C
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Chapter 35CalDAV supportSince 6.5.0
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Chapter 36Support for ActiveSyncSup
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36.2 Supported versions of ActiveSy
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36.3 RoadSyncabcdeDevice typeEmail
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36.4 SSL encryptionWarning: It is n
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36.5 Remote deletion of the device
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36.6 Removing a device from the adm
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36.8 Troubleshooting36.8 Troublesho
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Chapter 37Support for BlackBerry vi
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If any problem occurs regarding com
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Chapter 40Kerio Sync Connector for
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Figure 40.2Log settings in Kerio Sy
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Apple Mail options and settings are
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42.1 Email42.1 EmailOn Apple iPhone
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43.1 Contacts43.1 ContactsUSAKerio
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Nokia ® and Mail for Exchange ® a
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arising from, out of or in connecti
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Glossary of termsApplication protoc
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MX RecordsOne of the record types t
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IndexAaccess rightsgroups 131accoun
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mailing lists 220MAPI 396master aut
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