If a remote host or domain has no username password entry then Postfix LMTP client will not attempt to authenticate . Whether specified in main or on perdestination basis trustanchor PEM file must be accessible to Postfix SMTP client chroot jail applicable. lmtp sasl password maps default empty Optional client lookup tables with one username entry per host domain. As global default rather than persite setting this practical when mail for all recipients sent to central hub. address verify positive expire time default The after which successful probe expires from verification cache [...]

The options override main settings and are either implemented by smtpd qmqpd or pickup themselves they forwarded to cleanup server. The last setting disables ciphers that use EDH key exchange with RSA authentication [...]

At all costs avoid frequent restarts of the queue manager . Specify a list of network blocks hostnames main the initial dot causes domain to match any below . by a multiinstance manager [...]

Smtpd reject unlisted recipient default yes Request that the Postfix server rejects mail for unknown addresses even when explicit access restriction specified. When TLS handshakes fail the connection is retried with disabled. When connection caching is effect for particular destination established connections are reused to send additional messages this reduces the number of made per delivery and maintains good throughput even face partial unavailability MX hosts [...]

Do not flush the deferred queue unless you expect that most of its content have recently become deliverable set aggressive concurrency limits to remote domains without coordinating administrators target . TLS will not be used unless enabled for specific destinations via smtp policy maps. Tuning the number of processes on system MacOS X will run out slots when you increase Postfix limits. Example disable vrfy command no dns ncache ttl fix enable default workaround for future libc The Postfix implementation of RFC negative reply caching relies promise that res query search invoke send which returns server response application buffer even if requested record does not exist [...]

The table search order is as follows Look up user extension domain address including optional . See transport for details. This file may also contain the CA certificates of other trusted CAs. This service performs DNS white blacklist lookups [...]

DISPLAY Needed for debugging Postfix daemons with an Xwindows debugger. and connection reuse attribute Postfix. Illformatted files that are dropped into this queue deleted by the Pickup process without notifying originator of message [...]

Style. main smtp tls security level none Opportunistic may Mandatory highgrade encryption ciphers verification of hostname nexthop domain verify cert match dotnexthop Secure channel with exact matching protocols TLSv This feature available Postfix. rewrite service name default The of address rewriting . If you must respond please put It worked thanks in the Subject so can delete these quickly [...]

Trivalrewrite The trivialrewrite daemon processes three types of client service requests. Setting high concurrency limits to domains that are not your own may be viewed as hostile by the receiving system and steps taken prevent from monopolizing destination resources. By default only trusted clients are allowed to specify XVERP [...]

Message strip characters default empty The set of that Postfix will remove from content. If one MX host is down and the default SMTP connection timeout throughput limit messages per second. smtp mx address limit default The maximal number of mail exchanger IP addresses that can result from Postfix client lookups or zero no . check recipient access type table Search the specified database for resolved RCPT TO address domain parent domains email protected and execute corresponding action [...]

If this parameter nonempty then Postfix SMTP server will reject mail to unknown relay users. The following parameters can be used to implement filter for specific delivery agents lmtp status local pipe smtp virtual . In other words workaround is normally turned off for first delivery attempt. It is enabled by default [...]

Rt sigprocmask BLOCK CHLD . notify Inspect the content of postmaster notifications by smtp and smtpd processes. default destination concurrency negative feedback The perdestination amount of delivery after completes with connection or handshake failure [...]