Postfix Overview - Introduction - SCN Research

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smtp_bind_address
Numerical network address to bind to when making a
connection.
Authentication controls
smtp_enable_sasl_auth
Enable per-session authentication as per RFC 2554
(SASL). By default, Postfix is built without SASL
support.
smtp_sasl_password_maps
Lookup tables with per-host or domain name:password
entries. No entry for a host means no attempt to
authenticate.
smtp_sasl_security_options
Zero or more of the following.
noplaintext
Disallow authentication methods that use
plaintext passwords.
noactive
Disallow authentication methods that are
vulnerable to non-dictionary active attacks.
nodictionary
Disallow authentication methods that are
vulnerable to passive dictionary attack.
noanonymous
Disallow anonymous logins.
Resource controls
smtp_destination_concurrency_limit
Limit the number of parallel deliveries to the same
destination. The default limit is taken from the
default_destination_concurrency_limit parameter.
smtp_destination_recipient_limit
Limit the number of recipients per message delivery.
The default limit is taken from the
default_destination_recipient_limit parameter.
Timeout controls
The default time unit is seconds; an explicit time unit
can be specified by appending a one-letter suffix to the
value: s (seconds), m (minutes), h (hours), d (days) or w
(weeks).
smtp_connect_timeout
Timeout for completing a TCP connection. When no
connection can be made within the deadline, the
SMTP client tries the next address on the mail
exchanger list.
smtp_helo_timeout
Timeout for receiving the SMTP greeting banner.
When the server drops the connection without sending
a greeting banner, or when it sends no greeting
banner within the deadline, the SMTP client tries
the next address on the mail exchanger list.
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