How To Use Regular Expressions (regex) To Forward Email In Postfix

Author: erics, April 7th, 2015

Create the file /etc/postfix/virtual-regexp. For example, forward all emails with a leading eric and ending with @thewyz.net to a Gmail account:

/eric.*/@thewyz.net     wyzaerd@gmail.com

1	/eric.*/@thewyz.net wyzaerd@gmail.com

Edit the file /etc/postfix/main.cf. Add regexp:/etc/postfix/virtual-regexp to the virtual_alias_maps line. For example:

virtual_alias_maps = hash:/etc/postfix/virtual, regexp:/etc/postfix/virtual-regexp

1	virtual_alias_maps = hash:/etc/postfix/virtual, regexp:/etc/postfix/virtual-regexp

Generate the map .db file:

postmap /etc/postfix/virtual-regexp

1	postmap /etc/postfix/virtual-regexp

This example requires the files virtual and virtual.db to exist, even if they are […]

How To Use Regular Expressions In JavaScript

Author: erics, November 3rd, 2011

RegExp.exec(string) Applies the RegExp to the given string, and returns the match information.

var match = /s(amp)le/i.exec("Sample text")

1	var match = /s(amp)le/i.exec("Sample text")

match then contains [“Sample”,”amp”] RegExp.test(string) Tests if the given string matches the Regexp, and returns true if matching, false if not.

var match = /sample/.test("Sample text")

1	var match = /sample/.test("Sample text")

match then contains false String.match(pattern) Matches given string with the RegExp. With g flag returns an array containing the […]