Exim/SmartCatch - Revision history

Vincent: sudo

2017-04-06T21:27:01Z

sudo

← Older revision		Revision as of 21:27, 6 April 2017
Line 26:		Line 26:

	Reload exim config<syntaxhighlight lang="console">		Reload exim config<syntaxhighlight lang="console">
	# systemctl reload exim4.service		$ sudo systemctl reload exim4.service
	</syntaxhighlight>		</syntaxhighlight>

Line 32:		Line 32:
	===== fcgiwrap =====		===== fcgiwrap =====
	<syntaxhighlight lang="console">		<syntaxhighlight lang="console">
	# apt install fcgiwrap		$ sudo apt install fcgiwrap
	</syntaxhighlight>{{TODO\|msg = }}		</syntaxhighlight>{{TODO\|msg = }}
	[[Category:Email Server]]		[[Category:Email Server]]
	[[Category:Linux Server]]		[[Category:Linux Server]]

Vincent: Add categories

2016-06-04T18:48:51Z

Add categories

← Older revision		Revision as of 18:48, 4 June 2016
Line 34:		Line 34:
	# apt install fcgiwrap		# apt install fcgiwrap
	</syntaxhighlight>{{TODO\|msg = }}		</syntaxhighlight>{{TODO\|msg = }}
			[[Category:Email Server]]
			[[Category:Linux Server]]

Vincent: Email validation

2016-04-06T07:41:24Z

Email validation

← Older revision		Revision as of 07:41, 6 April 2016
Line 9:		Line 9:
	$ </dev/urandom tr -dc A-Za-z0-9 \| head -c8; echo		$ </dev/urandom tr -dc A-Za-z0-9 \| head -c8; echo
	AwatgLfG		AwatgLfG
	</syntaxhighlight>		</syntaxhighlight>As the name indicate, this must stay secret. Anybody with this secret will be able to generate valid email addresses for your domain.

	== Validate Address ==		== Validate Address ==
	{{~~TODO\|msg =~~ }}		Create file <code>/etc/exim4/conf.d/router/440_smartcatch</code><syntaxhighlight lang="properties">
			smart_catch:
			debug_print = "R: smart_catch for $local_part@$domain"
			driver = redirect
			domains = +local_domains
			condition = ${if eq{${substr_0_3:${md5:${substr_-4:$local_part}@$domain@AwatgLfG}}}{${substr_-3_3:$local_part}}}
			data = yourrealemail@example.com
			retry_use_local_part
			headers_add = X-smartcatch: true
			</syntaxhighlight>Replace <code>AwatgLfG</code> in the condition with the secret that you generated above. Also replace your email.

			The line <code>header_add</code> is only there to help debugging. It can be safely removed.

			Reload exim config<syntaxhighlight lang="console">
			# systemctl reload exim4.service
			</syntaxhighlight>

	== Generate Addresses ==		== Generate Addresses ==

	===== fcgiwrap =====		===== fcgiwrap =====
	<syntaxhighlight lang="console">		<syntaxhighlight lang="console">
	# apt install fcgiwrap		# apt install fcgiwrap
	</syntaxhighlight>{{TODO\|msg = }}		</syntaxhighlight>{{TODO\|msg = }}

Vincent: Created page with "One great thing about having your mail server is to have an infinite number of email addresses. This is great to protect against spam. Eg. you give the address ''sitename@exam..."

2016-04-05T21:26:35Z

Created page with "One great thing about having your mail server is to have an infinite number of email addresses. This is great to protect against spam. Eg. you give the address ''sitename@exam..."

New page

One great thing about having your mail server is to have an infinite number of email addresses. This is great to protect against spam. Eg. you give the address ''sitename@example.com'' to a website. If this address starts to receive spam, you know who sold it and you can easily block it.

A common way to implement that is through a catchall address: all the emails to any address will end up in your box. The issue is that spammer are sending spam to random addresses and your smart idea to avoid spam will become an enormous spam trap.

Here we will configure addresses with embedded hash-code so only you can generate new addresses. The addresses will looks like ''sitename-rtx@example.com.''

== Generate secret ==
The first step is to generate some secret. This will be used both for generating your addresses and validating them.<syntaxhighlight lang="console">
$ </dev/urandom tr -dc A-Za-z0-9 | head -c8; echo
AwatgLfG
</syntaxhighlight>

== Validate Address ==
{{TODO|msg = }}

== Generate Addresses ==

===== fcgiwrap =====
<syntaxhighlight lang="console">
# apt install fcgiwrap
</syntaxhighlight>{{TODO|msg = }}