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server:mail [2018/10/29 15:13] digital man [Tags] Details on the FidoNet netmail gating and cleaned up the tags section |
server:mail [2022/02/25 15:23] (current) digital man [sbbs.ini] NewMailNotice and ForwardNotice have been replaced with text.dat strings |
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| The Synchronet Mail Server recognizes the incoming special address format: ''//<name>//#//<tag>//@//<host>//'' | The Synchronet Mail Server recognizes the incoming special address format: ''//<name>//#//<tag>//@//<host>//'' | ||
| - | The //<tag>// is extracted from the address and if it is **not** found in the ''data/user/<usernum>.smtptags'' file, the mail message is | + | The //<tag>// is extracted from the address and if it is **not** found in the ''data/user/<usernum>.smtpblock'' file, the mail message is |
| - | sent to the destination user. If the tag matches a line in the ''.smtptags'' file, the email is rejected by the mail server with a "no such user" error. | + | sent to the destination user. If the tag matches a line in the ''.smtpblock'' file, the email is rejected by the mail server with a "no such user" error. |
| - | This feature allows you (the sysop) to easily create and use "temporary" email addresses without requiring additional user accounts. Once you start receiving spam with a tag, just disable that tag by adding it to your ''.smtptags'' file. | + | This feature allows you (the sysop) to easily create and use "temporary" email addresses without requiring additional user accounts. Once you start receiving spam with a tag, just disable that tag by adding it to your ''.smtpblock'' file. |
| ==== Anti-SPAM ==== | ==== Anti-SPAM ==== | ||
| Line 129: | Line 129: | ||
| download and delete those messages (which could potentially include | download and delete those messages (which could potentially include | ||
| false positives). | false positives). | ||
| + | |||
| + | ===== sbbs.ini ===== | ||
| + | |||
| + | The ''[mail]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file supports the following configuration settings (''key = value'' lines): | ||
| + | |||
| + | ^ Key ^ Default Value ^ Description ^ | ||
| + | | AutoStart | true | Automatically start up the server (manual is only supported in [[monitor:sbbsctrl]]) | | ||
| + | | Interface | [global] | Comma-separated list of IPv4 and IPv6 network interfaces to listen on for incoming SMTP/SMTPS connections | | ||
| + | | POP3Interface | Interface | Comma-separated list of IPv4 and IPv6 network interfaces to listen on for incoming POP3/POP3S connections | | ||
| + | | OutboundInterface | [global] | IPv4 network interface to use for outgoing SMTP/SMTPS connections (0.0.0.0 = //any interface//) | | ||
| + | | SMTPPort | 25 | TCP port number to listen on for incoming SMTP mail-delivery connections | | ||
| + | | SubmissionPort | 587 | TCP port number to listen on for incoming SMTP mail-submission connections | | ||
| + | | TLSSubmissionPort | 465 | TCP port number to listen on for incoming SMTPS (encrypted) mail-submission connections | | ||
| + | | POP3Port | 110 | TCP port number to listen on for incoming POP3 mail-retrieval connections | | ||
| + | | TLSPOP3Port | 995 | TCP port number to listen on for incoming POP3S (encrypted) mail-retrieval connections | | ||
| + | | MaxClients | 10 | Maximum number of simultaneous incoming TCP sessions supported | | ||
| + | | MaxConcurrentConnections | 0 | Maximum number of concurrent connections (without login) from the same IP address (0 = unlimited) | | ||
| + | | MaxInactivity | 120 | Maximum amount of TCP session inactivity before timeout and disconnection (in seconds) | | ||
| + | | MaxDeliveryAttempts | 50 | Maximum number of outbound mail delivery attempts before mail is bounced back to sender | | ||
| + | | RescanFrequency | 60M | Frequency (in seconds) of mail base re-scans for outbound mail to be sent/re-sent | | ||
| + | | SemFileCheckFrequency | 2 | Frequency (in seconds) of checks for semaphore files | | ||
| + | | LinesPerYield | 10 | Interval (in message body lines) of thread-yields during message receive (0 = none) | | ||
| + | | MaxRecipients | 100 | Maximum number of mail recipients for a single inbound SMTP mail message | | ||
| + | | MaxMsgSize | 20MB | Maximum size of incoming SMTP mail messages, in bytes | | ||
| + | | MaxMsgsWaiting | 100 | Maximum number of messages allowed in a (non-W-exempt) user's inbox | | ||
| + | | ConnectTimeout | 30 | Timeout (in seconds) before blocked outbound SMTP/TCP connections are aborted | | ||
| + | | HostName | [global] | Hostname of this server | | ||
| + | | TempDirectory | [global] | Directory to use for the storage of temporary files | | ||
| + | | RelayServer | | Hostname or IP address of SMTP server to relay outbound mail through (requires ''RELAY_TX'' option) | | ||
| + | | RelayPort | 25 | TCP port number to connect with when relaying mail to RelayServer | | ||
| + | | RelayUsername | | Username used to authenticate with RelayServer | | ||
| + | | RelayPassword | | Password used to authenticate with RelayServer | | ||
| + | | DNSServer | <auto> | IP address of DNS server used to discover mail-exchange servers for outbound mail destinations | | ||
| + | | DefaultUser | | Default recipient of mail for unrecognized recipient names (blank = none) | | ||
| + | | DefaultCharset | | Default MIME Content-Type ''charset'' value when unspecified (e.g. ''IBM437'') | | ||
| + | | DNSBlacklistHeader | X-DNSBL | Header value to add to incoming mail messages from DNS-Blacklisted servers | | ||
| + | | DNSBlacklistSubject | SPAM | Word to insert into beginning of subject of mail messages from DNS-Blacklisted servers | | ||
| + | | POP3Sound | | WAV file to play upon incoming POP3 connections (Windows only) | | ||
| + | | InboundSound | | WAV file to play upon incoming SMTP/SMTPS connections (Windows only) | | ||
| + | | OutboundSound | | WAV file to play upon outgoing SMTP/SMTPS connections (Windows only) | | ||
| + | | JavaScript* | [global] | JavaScript-related settings for external mail processing | | ||
| + | | LogLevel | [global] | Minimum severity of log messages to be displayed / stored | | ||
| + | | BindRetryCount | [global] | Maximum number of TCP port bind attempts before failure | | ||
| + | | BindRetryDelay | [global] | Delay (in seconds) between TCP port bind retries | | ||
| + | | LoginAttempt* | [global] | Failed login attempt throttling / filtering / banning | | ||
| + | | Options | ''ALLOW_POP3'' | Mail server option flags (see below for details) | | ||
| + | |||
| + | ==== Options ==== | ||
| + | |||
| + | The ''Options'' key of the ''[mail]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file supports the following option flags (separated by a ''|'' character): | ||
| + | |||
| + | ^ Option ^ Description ^ | ||
| + | | USE_SUBMISSION_PORT | Support mail submissions on the SMTP submission port | | ||
| + | | TLS_SUBMISSION | Support incoming SMTP Submissions (encrypted) connections | | ||
| + | | ALLOW_POP3 | Support incoming POP3 connections for BBS users to use mail clients to retrieve the mail in their BBS inbox | | ||
| + | | DEBUG_POP3 | Log all POP3 activity (Debug log level) | | ||
| + | | TLS_POP3 | Support incoming POP3S (POP3/TLS) connections | | ||
| + | | DEBUG_TX | Log all transmissions (Debug log level) | | ||
| + | | DEBUG_RX_HEADER | Log headers of all received messages (Debug log level)| | ||
| + | | DEBUG_RX_BODY | Log body text of all received messages (Debug log level)| | ||
| + | | DEBUG_RX_RSP | Log all received responses (Debug log level) | | ||
| + | | ALLOW_RX_BY_NUMBER | Allow email to be received by user number in addition to name/alias (not recommended) | | ||
| + | | ALLOW_SYSOP_ALIASES | Allow email to received for various administrative aliases (e.g. "sysop", "postmaster") to be delivered to the sysop | | ||
| + | | NO_NOTIFY | Do not send telegrams to users notifying them of newly received email | | ||
| + | | NO_HOST_LOOKUP | Do not resolve/log hostnames of incoming TCP connections | | ||
| + | | USE_TCP_DNS | Use TCP instead of UDP for MX-record queries using DNS | | ||
| + | | NO_SENDMAIL | Do not send outbound Internet email | | ||
| + | | ALLOW_RELAY | Allow authenticated users to relay Internet email through this server | | ||
| + | | SMTP_AUTH_VIA_IP | Authenticate users via IP address when supported | | ||
| + | | DNSBL_REFUSE | Actively refuse all mail sessions from DNS-blacklisted servers | | ||
| + | | DNSBL_IGNORE | Ignore (silently-discard) mail from DNS-blacklisted servers | | ||
| + | | DNSBL_BADUSER | Block (report "invalid mailbox") mail from DNS-blacklisted servers | | ||
| + | | DNSBL_CHKRECVHDRS | Check "Received" headers in mail messages for DNS-blacklisted servers | | ||
| + | | DNSBL_THROTTLE | Throttle mail sessions from DNS-blacklisted servers | | ||
| + | | DNSBL_SPAMHASH | Store hashes of confirmed SPAM messages for later comparison | | ||
| + | | SEND_INTRANSIT | Send mail that is marked 'in-transit' (not recommended) | | ||
| + | | RELAY_TX | Relay outbound SMTP mail through an intermediary SMTP RelayServer | | ||
| + | | RELAY_AUTH_PLAIN | When relaying mail to a RelayServer, use SMTP-PLAIN AUTH | | ||
| + | | RELAY_AUTH_LOGIN | When relaying mail to a RelayServer, use SMTP-LOGIN AUTH | | ||
| + | | RELAY_AUTH_CRAM_MD5 | When relaying mail to a RelayServer, use SMTP-CRAM_MD5 AUTH | | ||
| + | | NO_AUTO_EXEMPT | Do not automatically exempt outbound mail recipients in ''dnsbl_exempt.cfg'' | | ||
| + | | NO_RECYCLE | Do not allow this server to be automatically recycled by external event | | ||
| + | | KILL_READ_SPAM | Mark received SPAM messages for "Kill after read" | | ||
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| ===== See Also ===== | ===== See Also ===== | ||
