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Diffstat (limited to '')
| -rw-r--r-- | README_FILES/ADDRESS_CLASS_README | 76 |
1 files changed, 42 insertions, 34 deletions
diff --git a/README_FILES/ADDRESS_CLASS_README b/README_FILES/ADDRESS_CLASS_README index 7605aa2..774976e 100644 --- a/README_FILES/ADDRESS_CLASS_README +++ b/README_FILES/ADDRESS_CLASS_README @@ -25,18 +25,23 @@ important for the operation of Postfix. An address class is defined by three items. - * The list of domains that are a member of that address class: for example, - all local domains, or all relay domains. + * The list of domains that are a member of that address class. - * The default delivery transport for that address class. For example, the - local, virtual or relay delivery transport (delivery transports are defined - in master.cf). This helps to keep Postfix configurations simple, by - avoiding the need for explicit routing information in transport maps. + Examples: all local domains, or all relay domains. - * The list of valid recipient addresses for that address class. The Postfix - SMTP server rejects invalid recipients with "User unknown in <name of - address class here> table". This helps to keep the Postfix queue free of - undeliverable MAILER-DAEMON messages. + * The default delivery transport for domains in that address class. + + Examples: local_transport or relay_transport (these point to services + defined in master.cf). + + Benefit: this avoids the need for explicit routing information in transport + maps. + + * The list of valid recipient addresses for that address class. + + Benefit: the Postfix SMTP server rejects an invalid recipient with "User + unknown in <name of address class> table", and avoids sending a MAILER- + DAEMON message with backscatter spam. WWhhaatt aaddddrreessss ccllaasssseess ddooeess PPoossttffiixx iimmpplleemmeenntt?? @@ -56,11 +61,11 @@ The local domain class. also includes mail for user@[ipaddress] when the IP address is listed with the inet_interfaces or proxy_interfaces parameters. - * Valid recipient addresses are listed with the local_recipient_maps - parameter, as described in LOCAL_RECIPIENT_README. The Postfix SMTP server - rejects invalid recipients with "User unknown in local recipient table". If - the local_recipient_maps parameter value is empty, then the Postfix SMTP - server accepts any address in the local domain class. + * Valid recipient addresses for those domains are listed with the + local_recipient_maps parameter, as described in LOCAL_RECIPIENT_README. The + Postfix SMTP server rejects invalid recipients with "User unknown in local + recipient table". If the local_recipient_maps parameter value is empty, + then the Postfix SMTP server accepts any address in the local domain class. * The mail delivery transport is specified with the local_transport parameter. The default value is llooccaall::$$mmyyhhoossttnnaammee for delivery with the @@ -69,20 +74,23 @@ The local domain class. The virtual alias domain class. * Purpose: hosted domains where each recipient address is aliased to an - address in a different domain, for example, a local UNIX system account or - a remote address. A virtual alias example is given in the VIRTUAL_README - file. + address in a different domain class, for example, a local UNIX system + account or a remote address. A virtual alias example is given in the + VIRTUAL_README file. * Domain names are listed in virtual_alias_domains. The default value is $virtual_alias_maps for Postfix 1.1 compatibility. - * Valid recipient addresses are listed with the virtual_alias_maps parameter. - The Postfix SMTP server rejects invalid recipients with "User unknown in - virtual alias table". The default value is $virtual_maps for Postfix 1.1 - compatibility. + * Valid recipient addresses for those domains are listed with the + virtual_alias_maps parameter. The Postfix SMTP server rejects invalid + recipients with "User unknown in virtual alias table". The default value is + $virtual_maps for Postfix 1.1 compatibility. + + Note: for historical reasons, virtual_alias_maps apply to recipients in + all domain classes, not only the virtual alias domain class. - * There is no mail delivery transport parameter. Every address must be - aliased to an address in some other domain. + * There is no configurable mail delivery transport. Every address must be + aliased to an address in some other domain class. The virtual mailbox domain class. @@ -93,11 +101,11 @@ The virtual mailbox domain class. * Domain names are listed with the virtual_mailbox_domains parameter. The default value is $virtual_mailbox_maps for Postfix 1.1 compatibility. - * Valid recipient addresses are listed with the virtual_mailbox_maps - parameter. The Postfix SMTP server rejects invalid recipients with "User - unknown in virtual mailbox table". If this parameter value is empty, the - Postfix SMTP server accepts all recipients for domains listed in - $virtual_mailbox_domains. + * Valid recipient addresses for those domains are listed with the + virtual_mailbox_maps parameter. The Postfix SMTP server rejects invalid + recipients with "User unknown in virtual mailbox table". If this parameter + value is empty, the Postfix SMTP server accepts all recipients for domains + listed in $virtual_mailbox_domains. * The mail delivery transport is specified with the virtual_transport parameter. The default value is vviirrttuuaall for delivery with the virtual(8) @@ -113,11 +121,11 @@ The relay domain class. * Domain names are listed with the relay_domains parameter. - * Valid recipient addresses are listed with the relay_recipient_maps - parameter. The Postfix SMTP server rejects invalid recipients with "User - unknown in relay recipient table". If this parameter value is empty, the - Postfix SMTP server accepts all recipients for domains listed with the - relay_domains parameter. + * Valid recipient addresses for those domains are listed with the + relay_recipient_maps parameter. The Postfix SMTP server rejects invalid + recipients with "User unknown in relay recipient table". If this parameter + value is empty, the Postfix SMTP server accepts all recipients for domains + listed with the relay_domains parameter. * The mail delivery transport is specified with the relay_transport parameter. The default value is rreellaayy which is a clone of the smtp(8) |