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Postfix Configuration Parameters, Feb 8 2008
These override the built-in templates of delivery status notification (DSN) messages for undeliverable mail, for delayed mail, successful delivery, or delivery verification. The bounce(5) manual page describes how to edit and test template files.
Force specific internal tests to fail, to test the handling of errors that are difficult to reproduce otherwise.
Whether or not a local(8) recipient's home directory must exist before mail delivery is attempted. By default this test is disabled.
A certificate supplied here must be usable as an SSL client certificate and hence pass the "openssl verify -purpose sslclient ..." test.
A certificate supplied here must be usable as an SSL server certificate and hence pass the "openssl verify -purpose sslserver ..." test.

Postfix Configuration Parameters, Feb 8 2008
These override the built-in templates of delivery status notification (DSN) messages for undeliverable mail, for delayed mail, successful delivery, or delivery verification. The bounce(5) manual page describes how to edit and test template files.
Force specific internal tests to fail, to test the handling of errors that are difficult to reproduce otherwise.
Whether or not a local(8) recipient's home directory must exist before mail delivery is attempted. By default this test is disabled.
A certificate supplied here must be usable as an SSL client certificate and hence pass the "openssl verify -purpose sslclient ..." test.
A certificate supplied here must be usable as an SSL server certificate and hence pass the "openssl verify -purpose sslserver ..." test.

Postfix Configuration Parameters, Feb 8 2008
These override the built-in templates of delivery status notification (DSN) messages for undeliverable mail, for delayed mail, successful delivery, or delivery verification. The bounce(5) manual page describes how to edit and test template files.
Force specific internal tests to fail, to test the handling of errors that are difficult to reproduce otherwise.
Whether or not a local(8) recipient's home directory must exist before mail delivery is attempted. By default this test is disabled.
A certificate supplied here must be usable as an SSL client certificate and hence pass the "openssl verify -purpose sslclient ..." test.
A certificate supplied here must be usable as an SSL server certificate and hence pass the "openssl verify -purpose sslserver ..." test.

Postfix SASL Howto, Feb 8 2008
Testing SASL authentication in the Postfix SMTP server
Testing SASL authentication in the Postfix SMTP server
To test the server side, connect (for example, with telnet) to the Postfix SMTP server port and you should be able to have a conversation as shown below. Information sent by the client (that is, you) is shown in bold font.
Instead of AHRlc3QAdGVzdHBhc3M=, specify the base64 encoded form of \0username\0password (the \0 is a null byte). The example above is for a user named `test' with password `testpass'.

Postfix and Mailman deliver enhanced e-mail security and performance, Feb 8 2008
Postfix seems to be less scary to manage than Sendmail. Customizing or even configuring Sendmail always feels like a big deal; on the other hand, Postfix is quite a bit easier to experiment with because you can test just one thing at a time. Venema, for example, recently added a "debugging" feature suggested by Bennett Todd, a Unix systems and security analyst working on Wall Street: a "soft_bounce" selection to ensure that, even in the case of misconfiguration, messages are not erroneously returned to their senders.
Should you stay with Sendmail? Try Postfix? Test-drive a commercial alternative? Here are the main elements we consider when deciding between these possibilities:
The software you're already using to handle your e-mail requirements probably works reliably. However, the scale of your operations is likely growing, while security threats become more difficult, and your users' demands for convenience expand. It might be time for you to move to a new technology -- one better suited to modern needs. Several of the best e-mail products are open source. In particular, you can easily install Postfix and Mailman, and test their performance in realistic settings. Postfix and Mailman already have healthy user communities. You can have confidence that Postfix and Mailman will be fresh and well-supported for years to come.

Postfix Debugging Howto, Feb 8 2008
These reports contain information that is generated by Postfix delivery agents. Since these run as daemon processes that cannot interact with users directly, the result is sent as mail to the sender of the test message. The format of these reports is practically identical to that of ordinary non-delivery notifications.
Consider using a test email address so that you don't have to reveal email addresses or passwords of innocent people.
If you can't use a test email address, please anonymize email addresses and host names consistently. Replace each letter by "A", each digit by "D" so that the helpers can still recognize syntactical errors.

Postfix TLS Support, Feb 8 2008
A Postfix SMTP server certificate supplied here must be usable as SSL server certificate and hence pass the "openssl verify -purpose sslserver ..." test.
A Postfix SMTP client certificate supplied here must be usable as SSL client certificate and hence pass the "openssl verify -purpose sslclient ..." test.
To test this tunnel, use:

Postfix XCLIENT Howto, Feb 8 2008
Access control tests. SMTP server access rules are difficult to verify when decisions can be triggered only by remote clients. In order to facilitate access rule testing, an authorized SMTP client test program needs the ability to override the SMTP server's idea of the SMTP client hostname, network address, and other client information, for the entire duration of an SMTP session.

Postfix SMTP relay and access control, Feb 8 2008
The Postfix SMTP server receives mail from the network and is exposed to the big bad world of junk email and viruses. This document introduces the built-in and external methods that control what SMTP mail Postfix will accept, what mistakes to avoid, and how to test your configuration.
This is a different safety net that changes SMTP server REJECT actions into warnings. Instead of rejecting a command, Postfix logs what it would reject. Specify "warn_if_reject" in an SMTP access restriction list, before the restriction that you want to test without actually rejecting mail.

Postfix Connection Cache, Feb 8 2008
Nov 3 16:04:31 myname postfix/smtp: 19B6B2900FE: to=<wietse@test.example.com>, orig_to=<wietse@test>, relay=mail.example.com, conn_use=2, delay=0.22, delays=0.04/0.01/0.05/0.1, dsn=2.0.0, status=sent (250 2.0.0 Ok)

Postfix ETRN Howto, Feb 8 2008
By default, "fast ETRN" service is enabled for all domains that match $relay_domains. If you run Postfix with "fast ETRN" service for the very first time, you need to run "sendmail -q" once in order to populate the per-site deferred mail logfiles. If you omit this step, no harm is done. The logfiles will eventually become populated as Postfix routinely attempts to deliver delayed mail, but that will take a couple hours. After the "sendmail -q" command has completed all delivery attempts (this can take a while), you're ready to test the "fast ETRN" service.
To test the "fast ETRN" service, telnet to the Postfix SMTP server from a client that is allowed to execute ETRN commands (by default, that's every client), and type the commands shown in boldface:

Postfix Address Rewriting, Feb 8 2008
These reports contain information that is generated by Postfix delivery agents. Since these run as daemon processes and do not interact with users directly, the result is sent as mail to the sender of the test message. The format of these reports is practically identical to that of ordinary non-delivery notifications.

Postfix Address Rewriting, Feb 8 2008
These reports contain information that is generated by Postfix delivery agents. Since these run as daemon processes and do not interact with users directly, the result is sent as mail to the sender of the test message. The format of these reports is practically identical to that of ordinary non-delivery notifications.

sendmail.net:, Feb 8 2008
When you name a program SATAN, you can expect your intentions to be misread. Wietse Venema discovered this firsthand when he and colleague Dan Farmer released the Security Administrator Tool for Analyzing Networks, reporting software designed to let administrators test their own networks for vulnerabilities, but immediately misconstrued as a toy for budding crackers.

Postfix IPv6 Support, Feb 8 2008
Test if Postfix can figure out its interface information.

Postfix Address Rewriting, Feb 8 2008
These reports contain information that is generated by Postfix delivery agents. Since these run as daemon processes and do not interact with users directly, the result is sent as mail to the sender of the test message. The format of these reports is practically identical to that of ordinary non-delivery notifications.

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