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Hi,
# DKIM
Please note that :
This is the revision 2 of this Work In Progress How-To
This is the revision 2 of this Work In Progress How-To.
Until this is natively integrated in YnH core apps, it will mean to that postfix conf will be blocked (or each time there is a change some configuration lines will need to be added to the end of /etc/postfix/main.cf)
Until this is natively integrated in YunoHost core apps, it will mean to that Postfix configuration will be blocked (or each time there is a change some configuration lines will need to be added to the end of /etc/postfix/main.cf).
To be fully functionnal DKIM requires a modification of the DNS, which propagantion can take up to 24h
To be fully functionnal DKIM requires a modification of the DNS, which propagantion can take up to 24h.
CREDIT : This tutorial has been initially based on the DKMI section of : http://sealedabstract.com/code/nsa-proof-your-e-mail-in-2-hours/ from Drew Crawford
CREDIT : This tutorial has been reviewed based on
Source: This tutorial has been initially based on the DKMI section of: http://sealedabstract.com/code/nsa-proof-your-e-mail-in-2-hours/ from Drew Crawford.
https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy from Popute Sebastian Armin
Source: This tutorial has been reviewed based on https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy from Popute Sebastian Armin
Replace DOMAIN.TLD by your own domain name
Replace DOMAIN.TLD by your own domain name.
Changes in rev 2 :
Changes in rev 2:
Much easier to manage more than one DOMAIN.TLD (future proof)
Updated configuration as it seemed that the previous one was based on old software
Much easier to manage more than one DOMAIN.TLD (future proof).
Updated configuration as it seemed that the previous one was based on old software.
So, here is the thing :
Solution 1 : Fully automatic script : (single domain)
So, here is the thing:
### With a script
Fully automatic script: (single domain)
```bash
git clone https://github.com/polytan02/yunohost_auto_config_basic
sudo ./yunohost_auto_config_basic/5_opendkim.sh
```
Solution 2 : All by hand !
We start by installing the right software :
### Manually
We start by installing the right software:
```bash
sudo aptitude install opendkim opendkim-tools
```
@ -78,12 +75,12 @@ Text to be placed in the text file:
SOCKET="inet:8891@localhost"
```
Configure postfix to use this milter:
Configure Postfix to use this milter:
```bash
sudo nano /etc/postfix/main.cf
```
Text to be placed AT THE END in the text file:
Text to be placed **at the end** in the text file:
```bash
# OpenDKIM milter
@ -116,7 +113,7 @@ Create a key table:
sudo nano /etc/opendkim/KeyTable
```
Text to be placed in the text file: Be very careful, it needs to be on a SINGLE LINE for each domain
Text to be placed in the text file: be very careful, it needs to be on a **single line** for each domain.
```bash
mail._domainkey.DOMAIN.TLD DOMAIN.TLD:mail:/etc/opendkim/keys/DOMAIN.TLD/mail.private
```
@ -131,13 +128,13 @@ Text to be placed in the text file:
*@DOMAIN.TLD mail._domainkey.DOMAIN.TLD
```
Now we generate the keys ! smile
Now we generate the keys! smile
```bash
sudo cd /etc/opendkim/keys/DOMAIN.TLD
sudo opendkim-genkey -s mail -d DOMAIN.TLD
```
Output the DKIM DNS line to the terminal. Then, we install it on our DNS server. My ZONE file looks like this. (Be very careful with the formatting, the "p=...." needs to be in a single line.
Output the DKIM DNS line to the terminal. Then, we install it on our DNS server. My ZONE file looks like this. (Be very careful with the formatting, the "p=...." needs to be in a single line.)
```bash
cat mail.txt
@ -149,17 +146,17 @@ And we don't forget to put the right rights otherwise opendkim will get grumpy..
chown -Rv opendkim:opendkim /etc/opendkim*
```
And finally, we restart everything :
And finally, we restart everything:
```bash
sudo service opendkim restart
sudo service postfix restart
```
To test if it is all working well (don't forget that the DNS propagation can take a bit of take....) you can simply send an email to check-auth@verifier.port25.com and a reply will be received. If everything works correctly you should see DKIM check: pass under Summary of Results.
To test if it is all working well (don't forget that the DNS propagation can take a bit of take…) you can simply send an email to check-auth@verifier.port25.com and a reply will be received. If everything works correctly you should see DKIM check: pass under Summary of Results.
You can also go to http://www.mail-tester.com
Lastly, don't forget to add a SPF key in your DNS such as :
Lastly, don't forget to add a SPF key in your DNS such as:
```bash
DOMAIN.TLD 300 TXT "v=spf1 a:DOMAIN.TLD mx ?all"
```