Mail not authenticating

[avio]

Hi.

I have Zimbra running, however, it seems that smtp does not require users to authenticate before sending. I thought this might be because the computers are on the same network. I have tested from another computer outside our network with thunderbird, and the mail also went through our server without needing to authenticate. How do I block any mails that is not authenticated?

Version: Version 5.0.10_GA_2638.UBUNTU8.FOSS Oct 3, 2008
OS: Linux mail 2.6.24-16-server #1 SMP Thu Apr 10 13:58:00 UTC 2008 i686 GNU/Linux
My zmprov settings are as follows:

# name ************
cn: *************
objectClass: zimbraServer
zimbraAdminPort: 7071
zimbraAdminURL: /zimbraAdmin
zimbraAttachmentsIndexedTextLimit: 1048576
zimbraBackupAutoGroupedInterval: 1d
zimbraBackupAutoGroupedNumGroups: 7
zimbraBackupAutoGroupedThrottled: FALSE
zimbraBackupMode: Standard
zimbraBackupReportEmailSubjectPrefix: ZCS Backup Report
zimbraBackupTarget: /opt/zimbra/backup
zimbraCalendarRecurrenceDailyMaxDays: 730
zimbraCalendarRecurrenceMaxInstances: 0
zimbraCalendarRecurrenceMonthlyMaxMonths: 360
zimbraCalendarRecurrenceOtherFrequencyMaxYears: 1
zimbraCalendarRecurrenceWeeklyMaxWeeks: 520
zimbraCalendarRecurrenceYearlyMaxYears: 100
zimbraClusterType: none
zimbraFileUploadMaxSize: 10240000
zimbraHsmAge: 30d
zimbraHttpNumThreads: 250
zimbraHttpSSLNumThreads: 50
zimbraId: ***************************
zimbraImapBindOnStartup: TRUE
zimbraImapBindPort: 143
zimbraImapCleartextLoginEnabled: FALSE
zimbraImapExposeVersionOnBanner: FALSE
zimbraImapNumThreads: 200
zimbraImapProxyBindPort: 7143
zimbraImapSSLBindOnStartup: TRUE
zimbraImapSSLBindPort: 993
zimbraImapSSLProxyBindPort: 7993
zimbraImapSSLServerEnabled: TRUE
zimbraImapSaslGssapiEnabled: FALSE
zimbraImapServerEnabled: TRUE
zimbraLmtpBindOnStartup: FALSE
zimbraLmtpBindPort: 7025
zimbraLmtpExposeVersionOnBanner: FALSE
zimbraLmtpNumThreads: 20
zimbraLmtpPermanentFailureWhenOverQuota: FALSE
zimbraLmtpServerEnabled: TRUE
zimbraLogToSyslog: FALSE
zimbraMailDiskStreamingThreshold: 1048576
zimbraMailMode: http
zimbraMailPort: 80
zimbraMailProxyPort: 8080
zimbraMailPurgeSleepInterval: 1m
zimbraMailReferMode: wronghost
zimbraMailSSLPort: 443
zimbraMailSSLProxyPort: 8443
zimbraMailURL: /zimbra
zimbraMemcachedBindPort: 11211
zimbraMessageCacheSize: 1671168
zimbraMtaAntiSpamLockMethod: flock
zimbraMtaAuthEnabled: TRUE
zimbraMtaAuthHost:*****************
zimbraMtaAuthTarget: TRUE
zimbraMtaAuthURL: http://**********:80/service/soap/
zimbraMtaDnsLookupsEnabled: TRUE
zimbraMtaMyDestination: localhost
zimbraMtaMyNetworks: 127.0.0.0/8 *************
zimbraMtaTlsAuthOnly: TRUE
zimbraNotebookFolderCacheSize: 1024
zimbraNotebookMaxCachedTemplatesPerFolder: 256
zimbraNotebookPageCacheSize: 10240
zimbraNotifyBindPort: 7035
zimbraNotifySSLBindPort: 7036
zimbraNotifySSLServerEnabled: TRUE
zimbraNotifyServerEnabled: TRUE
zimbraPop3BindOnStartup: TRUE
zimbraPop3BindPort: 110
zimbraPop3CleartextLoginEnabled: FALSE
zimbraPop3ExposeVersionOnBanner: FALSE
zimbraPop3NumThreads: 100
zimbraPop3ProxyBindPort: 7110
zimbraPop3SSLBindOnStartup: TRUE
zimbraPop3SSLBindPort: 995
zimbraPop3SSLProxyBindPort: 7995
zimbraPop3SSLServerEnabled: TRUE
zimbraPop3SaslGssapiEnabled: FALSE
zimbraPop3ServerEnabled: TRUE
zimbraRedoLogArchiveDir: redolog/archive
zimbraRedoLogDeleteOnRollover: TRUE
zimbraRedoLogEnabled: TRUE
zimbraRedoLogFsyncIntervalMS: 10
zimbraRedoLogLogPath: redolog/redo.log
zimbraRedoLogRolloverFileSizeKB: 102400
zimbraRemoteManagementCommand: /opt/zimbra/libexec/zmrcd
zimbraRemoteManagementPort: 22
zimbraRemoteManagementPrivateKeyPath: /opt/zimbra/.ssh/zimbra_identity
zimbraRemoteManagementUser: zimbra
zimbraReverseProxyHttpEnabled: FALSE
zimbraReverseProxyImapEnabledCapability: ACL
zimbraReverseProxyImapEnabledCapability: BINARY
zimbraReverseProxyImapEnabledCapability: CATENATE
zimbraReverseProxyImapEnabledCapability: CHILDREN
zimbraReverseProxyImapEnabledCapability: CONDSTORE
zimbraReverseProxyImapEnabledCapability: ENABLE
zimbraReverseProxyImapEnabledCapability: ESEARCH
zimbraReverseProxyImapEnabledCapability: ID
zimbraReverseProxyImapEnabledCapability: IDLE
zimbraReverseProxyImapEnabledCapability: IMAP4rev1
zimbraReverseProxyImapEnabledCapability: LIST-EXTENDED
zimbraReverseProxyImapEnabledCapability: LITERAL+
zimbraReverseProxyImapEnabledCapability: MULTIAPPEND
zimbraReverseProxyImapEnabledCapability: NAMESPACE
zimbraReverseProxyImapEnabledCapability: QRESYNC
zimbraReverseProxyImapEnabledCapability: QUOTA
zimbraReverseProxyImapEnabledCapability: RIGHTS=ektx
zimbraReverseProxyImapEnabledCapability: SASL-IR
zimbraReverseProxyImapEnabledCapability: SEARCHRES
zimbraReverseProxyImapEnabledCapability: UIDPLUS
zimbraReverseProxyImapEnabledCapability: UNSELECT
zimbraReverseProxyImapEnabledCapability: WITHIN
zimbraReverseProxyImapExposeVersionOnBanner: FALSE
zimbraReverseProxyImapSaslGssapiEnabled: FALSE
zimbraReverseProxyImapSaslPlainEnabled: TRUE
zimbraReverseProxyImapStartTlsMode: only
zimbraReverseProxyInactivityTimeout: 1h
zimbraReverseProxyLogLevel: info
zimbraReverseProxyLookupTarget: TRUE
zimbraReverseProxyMailEnabled: TRUE
zimbraReverseProxyPassErrors: TRUE
zimbraReverseProxyPop3EnabledCapability: EXPIRE 31 USER
zimbraReverseProxyPop3EnabledCapability: TOP
zimbraReverseProxyPop3EnabledCapability: UIDL
zimbraReverseProxyPop3EnabledCapability: USER
zimbraReverseProxyPop3EnabledCapability: XOIP
zimbraReverseProxyPop3ExposeVersionOnBanner: FALSE
zimbraReverseProxyPop3SaslGssapiEnabled: FALSE
zimbraReverseProxyPop3SaslPlainEnabled: TRUE
zimbraReverseProxyPop3StartTlsMode: only
zimbraReverseProxyRouteLookupTimeout: 15s
zimbraReverseProxyWorkerConnections: 10240
zimbraReverseProxyWorkerProcesses: 4
zimbraSSLCertificate: -----BEGIN CERTIFICATE-----
*********************
-----END CERTIFICATE-----
zimbraSSLPrivateKey: -----BEGIN RSA PRIVATE KEY-----

-----END RSA PRIVATE KEY-----
zimbraScheduledTaskNumThreads: 20
zimbraServiceEnabled: antivirus
zimbraServiceEnabled: antispam
zimbraServiceEnabled: logger
zimbraServiceEnabled: mailbox
zimbraServiceEnabled: mta
zimbraServiceEnabled: stats
zimbraServiceEnabled: snmp
zimbraServiceEnabled: spell
zimbraServiceEnabled: ldap
zimbraServiceHostname: *****************
zimbraServiceInstalled: antivirus
zimbraServiceInstalled: antispam
zimbraServiceInstalled: logger
zimbraServiceInstalled: mailbox
zimbraServiceInstalled: mta
zimbraServiceInstalled: stats
zimbraServiceInstalled: snmp
zimbraServiceInstalled: ldap
zimbraServiceInstalled: spell
zimbraSmtpHostname: ************************
zimbraSmtpPort: 25
zimbraSmtpSendPartial: FALSE
zimbraSmtpTimeout: 60
zimbraSoapExposeVersion: FALSE
zimbraSoapRequestMaxSize: 15360000
zimbraSpellCheckURL: http://*******************:7780/aspell.php
zimbraSshPublicKey: ssh-dss
**********== *************
zimbraTableMaintenanceGrowthFactor: 10
zimbraTableMaintenanceMaxRows: 1000000
zimbraTableMaintenanceMinRows: 10000
zimbraTableMaintenanceOperation: ANALYZE
zimbraVirusDefinitionsUpdateFrequency: 2h
zimbraXMPPEnabled: TRUE

[uxbod]

Mail relay testing and see if you are a open relay.